diff --git a/.apigentools-info b/.apigentools-info
index a3f64b90ff33..77bd224377ca 100644
--- a/.apigentools-info
+++ b/.apigentools-info
@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2024-07-19 18:52:03.778963",
-            "spec_repo_commit": "be099b30"
+            "regenerated": "2024-07-19 19:37:55.355441",
+            "spec_repo_commit": "a3f2b7d2"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2024-07-19 18:52:03.797239",
-            "spec_repo_commit": "be099b30"
+            "regenerated": "2024-07-19 19:37:55.373551",
+            "spec_repo_commit": "a3f2b7d2"
         }
     }
 }
\ No newline at end of file
diff --git a/.generator/schemas/v2/openapi.yaml b/.generator/schemas/v2/openapi.yaml
index b8a40a3fbef1..1d17a211ade1 100644
--- a/.generator/schemas/v2/openapi.yaml
+++ b/.generator/schemas/v2/openapi.yaml
@@ -684,7 +684,7 @@ components:
         created_by:
           $ref: '#/components/schemas/RelationshipToUser'
         modified_by:
-          $ref: '#/components/schemas/RelationshipToUser'
+          $ref: '#/components/schemas/NullableRelationshipToUser'
       type: object
     APIKeyResponse:
       description: Response for retrieving an API key.
diff --git a/lib/datadog_api_client/v2/models/api_key_relationships.rb b/lib/datadog_api_client/v2/models/api_key_relationships.rb
index 076dd4f83e5a..20c2d90b4f5c 100644
--- a/lib/datadog_api_client/v2/models/api_key_relationships.rb
+++ b/lib/datadog_api_client/v2/models/api_key_relationships.rb
@@ -41,10 +41,18 @@ def self.attribute_map
     def self.openapi_types
       {
         :'created_by' => :'RelationshipToUser',
-        :'modified_by' => :'RelationshipToUser'
+        :'modified_by' => :'NullableRelationshipToUser'
       }
     end
 
+    # List of attributes with nullable: true
+    # @!visibility private
+    def self.openapi_nullable
+      Set.new([
+        :'modified_by',
+      ])
+    end
+
     # Initializes the object
     # @param attributes [Hash] Model attributes in the form of hash
     # @!visibility private