diff --git a/core-services/prompt-registry/src/main/java/com/sap/ai/sdk/prompt/registry/client/PromptTemplatesApi.java b/core-services/prompt-registry/src/main/java/com/sap/ai/sdk/prompt/registry/client/PromptTemplatesApi.java
index 549328c12..b39598e62 100644
--- a/core-services/prompt-registry/src/main/java/com/sap/ai/sdk/prompt/registry/client/PromptTemplatesApi.java
+++ b/core-services/prompt-registry/src/main/java/com/sap/ai/sdk/prompt/registry/client/PromptTemplatesApi.java
@@ -516,7 +516,6 @@ public PromptTemplatePostResponse importPromptTemplate() throws OpenApiRequestEx
    * @param name (required) The value for the parameter name
    * @param aiResourceGroup (optional) Specify a resource group id to use
    * @param aiResourceGroupScope (optional) Specify whether the resource group scope is to be used
-   * @param includeSpec (optional, default to false) The value for the parameter includeSpec
    * @return PromptTemplateListResponse
    * @throws OpenApiRequestException if an error occurs while attempting to invoke the API
    */
@@ -526,8 +525,7 @@ public PromptTemplateListResponse listPromptTemplateHistory(
       @Nonnull final String version,
       @Nonnull final String name,
       @Nullable final String aiResourceGroup,
-      @Nullable final String aiResourceGroupScope,
-      @Nullable final Boolean includeSpec)
+      @Nullable final String aiResourceGroupScope)
       throws OpenApiRequestException {
     final Object localVarPostBody = null;
 
@@ -566,9 +564,6 @@ public PromptTemplateListResponse listPromptTemplateHistory(
     final MultiValueMap<String, Object> localVarFormParams =
         new LinkedMultiValueMap<String, Object>();
 
-    localVarQueryParams.putAll(
-        apiClient.parameterToMultiValueMap(null, "includeSpec", includeSpec));
-
     if (aiResourceGroup != null)
       localVarHeaderParams.add("AI-Resource-Group", apiClient.parameterToString(aiResourceGroup));
     if (aiResourceGroupScope != null)
@@ -618,7 +613,7 @@ public PromptTemplateListResponse listPromptTemplateHistory(
   public PromptTemplateListResponse listPromptTemplateHistory(
       @Nonnull final String scenario, @Nonnull final String version, @Nonnull final String name)
       throws OpenApiRequestException {
-    return listPromptTemplateHistory(scenario, version, name, null, null, null);
+    return listPromptTemplateHistory(scenario, version, name, null, null);
   }
 
   /**
diff --git a/core-services/prompt-registry/src/main/resources/spec/prompt-registry.yaml b/core-services/prompt-registry/src/main/resources/spec/prompt-registry.yaml
index f12f94189..21a221bbd 100644
--- a/core-services/prompt-registry/src/main/resources/spec/prompt-registry.yaml
+++ b/core-services/prompt-registry/src/main/resources/spec/prompt-registry.yaml
@@ -107,11 +107,6 @@ paths:
           required: true
           schema:
             type: string
-        - name: includeSpec
-          in: query
-          schema:
-            type: boolean
-            default: false
       responses:
         '200':
           description: Successful response