diff --git a/Entire-API-Collection/V3.2.yaml b/Entire-API-Collection/V3.2.yaml
index 420f80bb..bc3c4e5f 100644
--- a/Entire-API-Collection/V3.2.yaml
+++ b/Entire-API-Collection/V3.2.yaml
@@ -7058,9 +7058,7 @@ paths:
         '400':
           $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/bad-request'
         '403':
-          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/forbidden'
-        '404':
-          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/not-found'
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.1.2#/components/responses/forbidden'
         '500':
           $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/internal-server-error'    
         default:
diff --git a/SubmodelRegistryServiceSpecification/V3.2_SSP-001.yaml b/SubmodelRegistryServiceSpecification/V3.2_SSP-001.yaml
index 44edea16..bd4c9090 100644
--- a/SubmodelRegistryServiceSpecification/V3.2_SSP-001.yaml
+++ b/SubmodelRegistryServiceSpecification/V3.2_SSP-001.yaml
@@ -38,9 +38,7 @@ paths:
         '400':
           $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/bad-request'
         '403':
-          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/forbidden'
-        '404':
-          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/not-found'
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.1.2#/components/responses/forbidden'
         '500':
           $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/internal-server-error'    
         default:
diff --git a/SubmodelRegistryServiceSpecification/V3.2_SSP-002.yaml b/SubmodelRegistryServiceSpecification/V3.2_SSP-002.yaml
index 967c2f5d..72484ed3 100644
--- a/SubmodelRegistryServiceSpecification/V3.2_SSP-002.yaml
+++ b/SubmodelRegistryServiceSpecification/V3.2_SSP-002.yaml
@@ -38,9 +38,7 @@ paths:
         '400':
           $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/bad-request'
         '403':
-          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/forbidden'
-        '404':
-          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/not-found'
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.1.2#/components/responses/forbidden'
         '500':
           $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.2.0#/components/responses/internal-server-error'    
         default:
diff --git a/documentation/IDTA-01002-3/modules/ROOT/pages/changelog.adoc b/documentation/IDTA-01002-3/modules/ROOT/pages/changelog.adoc
index f3a04ced..da119a3a 100644
--- a/documentation/IDTA-01002-3/modules/ROOT/pages/changelog.adoc
+++ b/documentation/IDTA-01002-3/modules/ROOT/pages/changelog.adoc
@@ -62,6 +62,20 @@ h|Operation  h|Kind of Change h|Comment
 |===
 
 
+== Changes w.r.t. V3.1.2 to V3.1.3
+
+Major Changes:
+
+* ...
+
+
+Minor Changes:
+
+* Fixed the response payload type of `PutSubmodelById` in the Asset Administration Shell Repository OpenAPI files: status code `201` now returns a `Submodel` instead of a `Reference`. (https://github.com/admin-shell-io/aas-specs-api/issues/601[#601])
+* Updated the response contract of `PostAllAssetLinksById` in Discovery OpenAPI files by removing status code `404` for `POST /lookup/shells/{aasIdentifier}` to align with create-or-replace semantics. (https://github.com/admin-shell-io/aas-specs-api/issues/595[#595])
+* Updated the response contract of `PostAllAssetLinksById` in Discovery OpenAPI files by removing status code `409` for `POST /lookup/shells/{aasIdentifier}` to align with replace/update behavior on repeated payloads. (https://github.com/admin-shell-io/aas-specs-api/issues/596[#596])
+* Updated the response contract of `GetAllSubmodelDescriptors` in Submodel Registry OpenAPI files by removing status code `404` for `GET /submodel-descriptors`, so an empty collection is consistently represented by `200` with an empty result. (https://github.com/admin-shell-io/aas-specs-api/issues/597[#597])
+
 
 == Changes w.r.t. V3.1.1 to V3.1.2