diff --git a/src/Internal/Api/All.elm b/src/Internal/Api/All.elm
index 530eaa5..690381c 100644
--- a/src/Internal/Api/All.elm
+++ b/src/Internal/Api/All.elm
@@ -24,7 +24,7 @@ joinedMembers =
 
 {-| Send a message event into a Matrix room.
 -}
-sendMessageEvent : List String -> SendMessageEvent.SendMessageEventInput -> SendMessageEvent.SendMessageEventOutput
+sendMessageEvent : List String -> Maybe (SendMessageEvent.SendMessageEventInput -> SendMessageEvent.SendMessageEventOutput)
 sendMessageEvent =
     SendMessageEvent.sendMessageEvent
 
diff --git a/src/Internal/Api/SendMessageEvent/Api.elm b/src/Internal/Api/SendMessageEvent/Api.elm
index 7e22142..919fb89 100644
--- a/src/Internal/Api/SendMessageEvent/Api.elm
+++ b/src/Internal/Api/SendMessageEvent/Api.elm
@@ -1,6 +1,7 @@
-module Internal.Api.SendMessageEvent.Api exposing (..)
+module Internal.Api.SendMessageEvent.V1.Api exposing (sendMessageEventV1, sendMessageEventV2, SendMessageEventOutputV1, SendMessageEventInputV1)
 
 import Internal.Api.Request as R
+import Internal.Api.SendMessageEvent.V1.SpecObjects as SO1
 import Internal.Tools.Exceptions as X
 import Json.Decode as D
 import Task exposing (Task)
@@ -15,9 +16,30 @@ type alias SendMessageEventInputV1 =
     , transactionId : String
     }
 
+type alias SendMessageEventOutputV1 = Task X.Error SO1.EventResponse
 
-sendMessageEventV1 : D.Decoder a -> (a -> b) -> SendMessageEventInputV1 -> Task X.Error b
-sendMessageEventV1 decoder mapping data =
+
+sendMessageEventV1 : SendMessageEventInputV1 -> SendMessageEventOutputV1
+sendMessageEventV1 data =
+    R.rawApiCall
+        { headers = R.WithAccessToken data.accessToken
+        , method = "PUT"
+        , baseUrl = data.baseUrl
+        , path = "/_matrix/client/r0/rooms/{roomId}/send/{eventType}/{txnId}"
+        , pathParams =
+            [ ( "eventType", data.eventType )
+            , ( "roomId", data.roomId )
+            , ( "txnId", data.transactionId )
+            ]
+        , queryParams = []
+        , bodyParams = [ R.RequiredValue "*" data.content ]
+        , timeout = Nothing
+        , decoder = \_ -> SO1.eventResponseDecoder
+        }
+
+
+sendMessageEventV2 : SendMessageEventInputV1 -> SendMessageEventOutputV1
+sendMessageEventV2 data =
     R.rawApiCall
         { headers = R.WithAccessToken data.accessToken
         , method = "PUT"
@@ -31,5 +53,5 @@ sendMessageEventV1 decoder mapping data =
         , queryParams = []
         , bodyParams = [ R.RequiredValue "*" data.content ]
         , timeout = Nothing
-        , decoder = \_ -> D.map mapping decoder
+        , decoder = \_ -> SO1.eventResponseDecoder
         }
diff --git a/src/Internal/Api/SendMessageEvent/Main.elm b/src/Internal/Api/SendMessageEvent/Main.elm
index 6529755..57e94f3 100644
--- a/src/Internal/Api/SendMessageEvent/Main.elm
+++ b/src/Internal/Api/SendMessageEvent/Main.elm
@@ -1,23 +1,90 @@
 module Internal.Api.SendMessageEvent.Main exposing (..)
 
 import Internal.Api.SendMessageEvent.Api as Api
-import Internal.Api.SendMessageEvent.V1_2.Api as V1_2
-import Internal.Api.SendMessageEvent.V1_3.Api as V1_3
-import Internal.Api.SendMessageEvent.V1_4.Api as V1_4
-import Internal.Api.SendMessageEvent.V1_5.Api as V1_5
-import Internal.Api.SendMessageEvent.V1_5.Objects as O
-import Internal.Api.VersionControl as V
+import Internal.Tools.VersionControl as VC
 import Internal.Tools.Exceptions as X
 import Task exposing (Task)
 
 
-sendMessageEvent : List String -> SendMessageEventInput -> SendMessageEventOutput
-sendMessageEvent =
-    V.firstVersion V1_2.packet
-        |> V.updateWith V1_3.packet
-        |> V.updateWith V1_4.packet
-        |> V.updateWith V1_5.packet
-        |> V.toFunction
+sendMessageEvent : List String -> Maybe (SendMessageEventInput -> SendMessageEventOutput)
+sendMessageEvent versions =
+    VC.withBottomLayer
+        { current = Api.sendMessageEventV1
+        , version = "r0.0.0"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV1
+        , upcast   = identity
+        , version  = "r0.0.1"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV1
+        , upcast   = identity
+        , version  = "r0.1.0"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV1
+        , upcast   = identity
+        , version  = "r0.2.0"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV1
+        , upcast   = identity
+        , version  = "r0.3.0"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV1
+        , upcast   = identity
+        , version  = "r0.5.0"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV1
+        , upcast   = identity
+        , version  = "r0.6.0"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV1
+        , upcast   = identity
+        , version  = "r0.6.1"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV2
+        , upcast   = identity
+        , version  = "v1.1"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV2
+        , upcast   = identity
+        , version  = "v1.2"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV2
+        , upcast   = identity
+        , version  = "v1.3"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV2
+        , upcast   = identity
+        , version  = "v1.4"
+        }
+    |> VC.addMiddleLayer
+        { downcast = identity
+        , current  = Api.sendMessageEventV2
+        , upcast   = identity
+        , version  = "v1.5"
+        }
+    |> VC.mostRecentFromVersionList versions
 
 
 type alias SendMessageEventInput =
@@ -25,4 +92,4 @@ type alias SendMessageEventInput =
 
 
 type alias SendMessageEventOutput =
-    Task X.Error O.EventResponse
+    Api.SendMessageEventOutputV1
diff --git a/src/Internal/Api/SendMessageEvent/V1_4/SpecObjects.elm b/src/Internal/Api/SendMessageEvent/V1/SpecObjects.elm
similarity index 86%
rename from src/Internal/Api/SendMessageEvent/V1_4/SpecObjects.elm
rename to src/Internal/Api/SendMessageEvent/V1/SpecObjects.elm
index 36e4461..d2483c6 100644
--- a/src/Internal/Api/SendMessageEvent/V1_4/SpecObjects.elm
+++ b/src/Internal/Api/SendMessageEvent/V1/SpecObjects.elm
@@ -1,4 +1,4 @@
-module Internal.Api.SendMessageEvent.V1_4.SpecObjects exposing
+module Internal.Api.SendMessageEvent.V1.SpecObjects exposing
     ( EventResponse
     , encodeEventResponse
     , eventResponseDecoder
@@ -6,7 +6,7 @@ module Internal.Api.SendMessageEvent.V1_4.SpecObjects exposing
 
 {-| Automatically generated 'SpecObjects'
 
-Last generated at Unix time 1673279712
+Last generated at Unix time 1675952679
 
 -}
 
diff --git a/src/Internal/Api/SendMessageEvent/V1_2/SpecObjects.yaml b/src/Internal/Api/SendMessageEvent/V1/SpecObjects.yaml
similarity index 92%
rename from src/Internal/Api/SendMessageEvent/V1_2/SpecObjects.yaml
rename to src/Internal/Api/SendMessageEvent/V1/SpecObjects.yaml
index f5eaebe..9b619b4 100644
--- a/src/Internal/Api/SendMessageEvent/V1_2/SpecObjects.yaml
+++ b/src/Internal/Api/SendMessageEvent/V1/SpecObjects.yaml
@@ -1,4 +1,4 @@
-version: v1.2
+version: v1
 name: SpecObjects
 objects:
   EventResponse:
diff --git a/src/Internal/Api/SendMessageEvent/V1_2/Api.elm b/src/Internal/Api/SendMessageEvent/V1_2/Api.elm
deleted file mode 100644
index a407148..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_2/Api.elm
+++ /dev/null
@@ -1,16 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_2.Api exposing (..)
-
-import Internal.Api.SendMessageEvent.Api as Api
-import Internal.Api.SendMessageEvent.V1_2.Convert as C
-import Internal.Api.SendMessageEvent.V1_2.Objects as O
-import Internal.Api.SendMessageEvent.V1_2.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion () () Api.SendMessageEventInputV1 O.EventResponse
-packet =
-    { version = "v1.2"
-    , downcast = \_ -> ()
-    , current = Api.sendMessageEventV1 O.eventResponseDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/SendMessageEvent/V1_2/Convert.elm b/src/Internal/Api/SendMessageEvent/V1_2/Convert.elm
deleted file mode 100644
index 04d6c2a..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_2/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_2.Convert exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_2.Objects as O
-import Internal.Api.SendMessageEvent.V1_2.SpecObjects as SO
-
-
-convert : SO.EventResponse -> O.EventResponse
-convert =
-    identity
diff --git a/src/Internal/Api/SendMessageEvent/V1_2/Objects.elm b/src/Internal/Api/SendMessageEvent/V1_2/Objects.elm
deleted file mode 100644
index 62bcd68..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_2/Objects.elm
+++ /dev/null
@@ -1,38 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_2.Objects exposing
-    ( EventResponse
-    , encodeEventResponse
-    , eventResponseDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| A response confirming that an event has been sent.
--}
-type alias EventResponse =
-    { eventId : String
-    }
-
-
-encodeEventResponse : EventResponse -> E.Value
-encodeEventResponse data =
-    maybeObject
-        [ ( "event_id", Just <| E.string data.eventId )
-        ]
-
-
-eventResponseDecoder : D.Decoder EventResponse
-eventResponseDecoder =
-    D.map
-        (\a ->
-            { eventId = a }
-        )
-        (D.field "event_id" D.string)
diff --git a/src/Internal/Api/SendMessageEvent/V1_2/Objects.yaml b/src/Internal/Api/SendMessageEvent/V1_2/Objects.yaml
deleted file mode 100644
index 0d30551..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_2/Objects.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: v1.2
-name: Objects
-objects:
-  EventResponse:
-    description: A response confirming that an event has been sent.
-    fields:
-      event_id:
-        type: string
-        required: true
diff --git a/src/Internal/Api/SendMessageEvent/V1_2/SpecObjects.elm b/src/Internal/Api/SendMessageEvent/V1_2/SpecObjects.elm
deleted file mode 100644
index 8e57da4..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_2/SpecObjects.elm
+++ /dev/null
@@ -1,38 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_2.SpecObjects exposing
-    ( EventResponse
-    , encodeEventResponse
-    , eventResponseDecoder
-    )
-
-{-| Automatically generated 'SpecObjects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| A response confirming that an event has been sent.
--}
-type alias EventResponse =
-    { eventId : String
-    }
-
-
-encodeEventResponse : EventResponse -> E.Value
-encodeEventResponse data =
-    maybeObject
-        [ ( "event_id", Just <| E.string data.eventId )
-        ]
-
-
-eventResponseDecoder : D.Decoder EventResponse
-eventResponseDecoder =
-    D.map
-        (\a ->
-            { eventId = a }
-        )
-        (D.field "event_id" D.string)
diff --git a/src/Internal/Api/SendMessageEvent/V1_2/Upcast.elm b/src/Internal/Api/SendMessageEvent/V1_2/Upcast.elm
deleted file mode 100644
index d4b15d0..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_2/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_2.Upcast exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_2.Objects as O
-import Internal.Config.Leaking as L
-
-
-upcast : () -> O.EventResponse
-upcast _ =
-    { eventId = L.eventId }
diff --git a/src/Internal/Api/SendMessageEvent/V1_3/Api.elm b/src/Internal/Api/SendMessageEvent/V1_3/Api.elm
deleted file mode 100644
index 41c93e0..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_3/Api.elm
+++ /dev/null
@@ -1,17 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_3.Api exposing (..)
-
-import Internal.Api.SendMessageEvent.Api as Api
-import Internal.Api.SendMessageEvent.V1_2.Objects as PO
-import Internal.Api.SendMessageEvent.V1_3.Convert as C
-import Internal.Api.SendMessageEvent.V1_3.Objects as O
-import Internal.Api.SendMessageEvent.V1_3.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion Api.SendMessageEventInputV1 PO.EventResponse Api.SendMessageEventInputV1 O.EventResponse
-packet =
-    { version = "v1.3"
-    , downcast = identity
-    , current = Api.sendMessageEventV1 O.eventResponseDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/SendMessageEvent/V1_3/Convert.elm b/src/Internal/Api/SendMessageEvent/V1_3/Convert.elm
deleted file mode 100644
index 80259a8..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_3/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_3.Convert exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_3.Objects as O
-import Internal.Api.SendMessageEvent.V1_3.SpecObjects as SO
-
-
-convert : SO.EventResponse -> O.EventResponse
-convert =
-    identity
diff --git a/src/Internal/Api/SendMessageEvent/V1_3/Objects.elm b/src/Internal/Api/SendMessageEvent/V1_3/Objects.elm
deleted file mode 100644
index ba6a7c9..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_3/Objects.elm
+++ /dev/null
@@ -1,38 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_3.Objects exposing
-    ( EventResponse
-    , encodeEventResponse
-    , eventResponseDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| A response confirming that an event has been sent.
--}
-type alias EventResponse =
-    { eventId : String
-    }
-
-
-encodeEventResponse : EventResponse -> E.Value
-encodeEventResponse data =
-    maybeObject
-        [ ( "event_id", Just <| E.string data.eventId )
-        ]
-
-
-eventResponseDecoder : D.Decoder EventResponse
-eventResponseDecoder =
-    D.map
-        (\a ->
-            { eventId = a }
-        )
-        (D.field "event_id" D.string)
diff --git a/src/Internal/Api/SendMessageEvent/V1_3/Objects.yaml b/src/Internal/Api/SendMessageEvent/V1_3/Objects.yaml
deleted file mode 100644
index d302712..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_3/Objects.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: v1.3
-name: Objects
-objects:
-  EventResponse:
-    description: A response confirming that an event has been sent.
-    fields:
-      event_id:
-        type: string
-        required: true
diff --git a/src/Internal/Api/SendMessageEvent/V1_3/SpecObjects.elm b/src/Internal/Api/SendMessageEvent/V1_3/SpecObjects.elm
deleted file mode 100644
index e346914..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_3/SpecObjects.elm
+++ /dev/null
@@ -1,38 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_3.SpecObjects exposing
-    ( EventResponse
-    , encodeEventResponse
-    , eventResponseDecoder
-    )
-
-{-| Automatically generated 'SpecObjects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| A response confirming that an event has been sent.
--}
-type alias EventResponse =
-    { eventId : String
-    }
-
-
-encodeEventResponse : EventResponse -> E.Value
-encodeEventResponse data =
-    maybeObject
-        [ ( "event_id", Just <| E.string data.eventId )
-        ]
-
-
-eventResponseDecoder : D.Decoder EventResponse
-eventResponseDecoder =
-    D.map
-        (\a ->
-            { eventId = a }
-        )
-        (D.field "event_id" D.string)
diff --git a/src/Internal/Api/SendMessageEvent/V1_3/SpecObjects.yaml b/src/Internal/Api/SendMessageEvent/V1_3/SpecObjects.yaml
deleted file mode 100644
index e330263..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_3/SpecObjects.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: v1.3
-name: SpecObjects
-objects:
-  EventResponse:
-    description: A response confirming that an event has been sent.
-    fields:
-      event_id:
-        type: string
-        required: true
diff --git a/src/Internal/Api/SendMessageEvent/V1_3/Upcast.elm b/src/Internal/Api/SendMessageEvent/V1_3/Upcast.elm
deleted file mode 100644
index 2ca1c35..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_3/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_3.Upcast exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_2.Objects as PO
-import Internal.Api.SendMessageEvent.V1_3.Objects as O
-
-
-upcast : PO.EventResponse -> O.EventResponse
-upcast =
-    identity
diff --git a/src/Internal/Api/SendMessageEvent/V1_4/Api.elm b/src/Internal/Api/SendMessageEvent/V1_4/Api.elm
deleted file mode 100644
index 37ad6fb..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_4/Api.elm
+++ /dev/null
@@ -1,17 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_4.Api exposing (..)
-
-import Internal.Api.SendMessageEvent.Api as Api
-import Internal.Api.SendMessageEvent.V1_3.Objects as PO
-import Internal.Api.SendMessageEvent.V1_4.Convert as C
-import Internal.Api.SendMessageEvent.V1_4.Objects as O
-import Internal.Api.SendMessageEvent.V1_4.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion Api.SendMessageEventInputV1 PO.EventResponse Api.SendMessageEventInputV1 O.EventResponse
-packet =
-    { version = "v1.4"
-    , downcast = identity
-    , current = Api.sendMessageEventV1 O.eventResponseDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/SendMessageEvent/V1_4/Convert.elm b/src/Internal/Api/SendMessageEvent/V1_4/Convert.elm
deleted file mode 100644
index 19a4da6..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_4/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_4.Convert exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_4.Objects as O
-import Internal.Api.SendMessageEvent.V1_4.SpecObjects as SO
-
-
-convert : SO.EventResponse -> O.EventResponse
-convert =
-    identity
diff --git a/src/Internal/Api/SendMessageEvent/V1_4/Objects.elm b/src/Internal/Api/SendMessageEvent/V1_4/Objects.elm
deleted file mode 100644
index 65321e3..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_4/Objects.elm
+++ /dev/null
@@ -1,38 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_4.Objects exposing
-    ( EventResponse
-    , encodeEventResponse
-    , eventResponseDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| A response confirming that an event has been sent.
--}
-type alias EventResponse =
-    { eventId : String
-    }
-
-
-encodeEventResponse : EventResponse -> E.Value
-encodeEventResponse data =
-    maybeObject
-        [ ( "event_id", Just <| E.string data.eventId )
-        ]
-
-
-eventResponseDecoder : D.Decoder EventResponse
-eventResponseDecoder =
-    D.map
-        (\a ->
-            { eventId = a }
-        )
-        (D.field "event_id" D.string)
diff --git a/src/Internal/Api/SendMessageEvent/V1_4/Objects.yaml b/src/Internal/Api/SendMessageEvent/V1_4/Objects.yaml
deleted file mode 100644
index 93126c6..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_4/Objects.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: v1.4
-name: Objects
-objects:
-  EventResponse:
-    description: A response confirming that an event has been sent.
-    fields:
-      event_id:
-        type: string
-        required: true
diff --git a/src/Internal/Api/SendMessageEvent/V1_4/SpecObjects.yaml b/src/Internal/Api/SendMessageEvent/V1_4/SpecObjects.yaml
deleted file mode 100644
index 9ab5c91..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_4/SpecObjects.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: v1.4
-name: SpecObjects
-objects:
-  EventResponse:
-    description: A response confirming that an event has been sent.
-    fields:
-      event_id:
-        type: string
-        required: true
diff --git a/src/Internal/Api/SendMessageEvent/V1_4/Upcast.elm b/src/Internal/Api/SendMessageEvent/V1_4/Upcast.elm
deleted file mode 100644
index 84e9080..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_4/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_4.Upcast exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_3.Objects as PO
-import Internal.Api.SendMessageEvent.V1_4.Objects as O
-
-
-upcast : PO.EventResponse -> O.EventResponse
-upcast =
-    identity
diff --git a/src/Internal/Api/SendMessageEvent/V1_5/Api.elm b/src/Internal/Api/SendMessageEvent/V1_5/Api.elm
deleted file mode 100644
index 7680445..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_5/Api.elm
+++ /dev/null
@@ -1,17 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_5.Api exposing (..)
-
-import Internal.Api.SendMessageEvent.Api as Api
-import Internal.Api.SendMessageEvent.V1_4.Objects as PO
-import Internal.Api.SendMessageEvent.V1_5.Convert as C
-import Internal.Api.SendMessageEvent.V1_5.Objects as O
-import Internal.Api.SendMessageEvent.V1_5.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion Api.SendMessageEventInputV1 PO.EventResponse Api.SendMessageEventInputV1 O.EventResponse
-packet =
-    { version = "v1.5"
-    , downcast = identity
-    , current = Api.sendMessageEventV1 O.eventResponseDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/SendMessageEvent/V1_5/Convert.elm b/src/Internal/Api/SendMessageEvent/V1_5/Convert.elm
deleted file mode 100644
index 0df53f0..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_5/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_5.Convert exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_5.Objects as O
-import Internal.Api.SendMessageEvent.V1_5.SpecObjects as SO
-
-
-convert : SO.EventResponse -> O.EventResponse
-convert =
-    identity
diff --git a/src/Internal/Api/SendMessageEvent/V1_5/Objects.elm b/src/Internal/Api/SendMessageEvent/V1_5/Objects.elm
deleted file mode 100644
index 1828555..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_5/Objects.elm
+++ /dev/null
@@ -1,38 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_5.Objects exposing
-    ( EventResponse
-    , encodeEventResponse
-    , eventResponseDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| A response confirming that an event has been sent.
--}
-type alias EventResponse =
-    { eventId : String
-    }
-
-
-encodeEventResponse : EventResponse -> E.Value
-encodeEventResponse data =
-    maybeObject
-        [ ( "event_id", Just <| E.string data.eventId )
-        ]
-
-
-eventResponseDecoder : D.Decoder EventResponse
-eventResponseDecoder =
-    D.map
-        (\a ->
-            { eventId = a }
-        )
-        (D.field "event_id" D.string)
diff --git a/src/Internal/Api/SendMessageEvent/V1_5/Objects.yaml b/src/Internal/Api/SendMessageEvent/V1_5/Objects.yaml
deleted file mode 100644
index b2411ba..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_5/Objects.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: v1.5
-name: Objects
-objects:
-  EventResponse:
-    description: A response confirming that an event has been sent.
-    fields:
-      event_id:
-        type: string
-        required: true
diff --git a/src/Internal/Api/SendMessageEvent/V1_5/SpecObjects.elm b/src/Internal/Api/SendMessageEvent/V1_5/SpecObjects.elm
deleted file mode 100644
index 1534cb2..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_5/SpecObjects.elm
+++ /dev/null
@@ -1,38 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_5.SpecObjects exposing
-    ( EventResponse
-    , encodeEventResponse
-    , eventResponseDecoder
-    )
-
-{-| Automatically generated 'SpecObjects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| A response confirming that an event has been sent.
--}
-type alias EventResponse =
-    { eventId : String
-    }
-
-
-encodeEventResponse : EventResponse -> E.Value
-encodeEventResponse data =
-    maybeObject
-        [ ( "event_id", Just <| E.string data.eventId )
-        ]
-
-
-eventResponseDecoder : D.Decoder EventResponse
-eventResponseDecoder =
-    D.map
-        (\a ->
-            { eventId = a }
-        )
-        (D.field "event_id" D.string)
diff --git a/src/Internal/Api/SendMessageEvent/V1_5/SpecObjects.yaml b/src/Internal/Api/SendMessageEvent/V1_5/SpecObjects.yaml
deleted file mode 100644
index ee1cb6f..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_5/SpecObjects.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: v1.5
-name: SpecObjects
-objects:
-  EventResponse:
-    description: A response confirming that an event has been sent.
-    fields:
-      event_id:
-        type: string
-        required: true
diff --git a/src/Internal/Api/SendMessageEvent/V1_5/Upcast.elm b/src/Internal/Api/SendMessageEvent/V1_5/Upcast.elm
deleted file mode 100644
index cdf56d6..0000000
--- a/src/Internal/Api/SendMessageEvent/V1_5/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.SendMessageEvent.V1_5.Upcast exposing (..)
-
-import Internal.Api.SendMessageEvent.V1_4.Objects as PO
-import Internal.Api.SendMessageEvent.V1_5.Objects as O
-
-
-upcast : PO.EventResponse -> O.EventResponse
-upcast =
-    identity