diff --git a/modules/openapi-generator/src/main/resources/swift6/Models.mustache b/modules/openapi-generator/src/main/resources/swift6/Models.mustache
index 06576779dc40..0a1f951e7682 100644
--- a/modules/openapi-generator/src/main/resources/swift6/Models.mustache
+++ b/modules/openapi-generator/src/main/resources/swift6/Models.mustache
@@ -70,7 +70,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-{{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} enum ErrorResponse: Error, @unchecked Sendable {
+{{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -82,7 +82,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     case requestMissingURL
 }
 
-{{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+{{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
index a51480e9dbd2..c1df20ed54ce 100644
--- a/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -70,7 +70,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -82,7 +82,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift
index a51480e9dbd2..c1df20ed54ce 100644
--- a/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -70,7 +70,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -82,7 +82,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift b/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 74c89f434f10..d7086fdd4de4 100644
--- a/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-internal enum ErrorResponse: Error, @unchecked Sendable {
+internal enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ internal enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-internal enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+internal enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode
diff --git a/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 2b7940a33af1..f7a9f4f40195 100644
--- a/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -69,7 +69,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     }
 }
 
-public enum ErrorResponse: Error, @unchecked Sendable {
+public enum ErrorResponse: Error, Sendable {
     case error(Int, Data?, URLResponse?, Error)
 }
 
@@ -81,7 +81,7 @@ public enum DownloadException: Error, Sendable {
     case requestMissingURL
 }
 
-public enum DecodableRequestBuilderError: Error, @unchecked Sendable {
+public enum DecodableRequestBuilderError: Error, Sendable {
     case emptyDataResponse
     case nilHTTPResponse
     case unsuccessfulHTTPStatusCode