diff --git a/models/common/model.tsp b/models/common/model.tsp
index 82878b8..6dd70aa 100644
--- a/models/common/model.tsp
+++ b/models/common/model.tsp
@@ -44,22 +44,7 @@ model ObjectReference2<Kind> {
 }
 
 /**
- * Validation constraint types for field-level errors
- */
-enum ValidationConstraint {
-    required: "required",
-    min: "min",
-    max: "max",
-    min_length: "min_length",
-    max_length: "max_length",
-    pattern_match: "pattern",
-    enum_value: "enum",
-    format_check: "format",
-    unique: "unique",
-}
-
-/**
- * Field-level validation error detail (RFC 9457 extension)
+ * Field-level validation error detail
  */
 model ValidationError {
     /** JSON path to the field that failed validation */
@@ -70,7 +55,8 @@ model ValidationError {
     value?: unknown;
 
     /** The validation constraint that was violated */
-    constraint?: ValidationConstraint;
+    @example("required")
+    constraint?: "required" | "min" | "max" | "min_length" | "max_length" | "pattern" | "enum" | "format" | "unique";
 
     /** Human-readable error message for this field */
     @example("Cluster name is required")
@@ -94,7 +80,7 @@ model Error {
 
     /** HTTP status code */
     @example(400)
-    status: int32;
+    status: integer;
 
     /** Human-readable explanation specific to this occurrence */
     @example("The cluster name field is required")
diff --git a/schemas/core/openapi.yaml b/schemas/core/openapi.yaml
index 8e656c5..28168b6 100644
--- a/schemas/core/openapi.yaml
+++ b/schemas/core/openapi.yaml
@@ -932,7 +932,6 @@ components:
           example: Validation Failed
         status:
           type: integer
-          format: int32
           description: HTTP status code
           example: 400
         detail:
@@ -1289,19 +1288,6 @@ components:
         - Ready
         - Failed
       description: Phase of a resource (Cluster or NodePool)
-    ValidationConstraint:
-      type: string
-      enum:
-        - required
-        - min
-        - max
-        - min_length
-        - max_length
-        - pattern
-        - enum
-        - format
-        - unique
-      description: Validation constraint types for field-level errors
     ValidationError:
       type: object
       required:
@@ -1315,14 +1301,24 @@ components:
         value:
           description: The invalid value that was provided (if safe to include)
         constraint:
-          allOf:
-            - $ref: '#/components/schemas/ValidationConstraint'
+          type: string
+          enum:
+            - required
+            - min
+            - max
+            - min_length
+            - max_length
+            - pattern
+            - enum
+            - format
+            - unique
           description: The validation constraint that was violated
+          example: required
         message:
           type: string
           description: Human-readable error message for this field
           example: Cluster name is required
-      description: Field-level validation error detail (RFC 9457 extension)
+      description: Field-level validation error detail
   securitySchemes:
     BearerAuth:
       type: http
diff --git a/schemas/gcp/openapi.yaml b/schemas/gcp/openapi.yaml
index 7f7ca4e..478faff 100644
--- a/schemas/gcp/openapi.yaml
+++ b/schemas/gcp/openapi.yaml
@@ -878,7 +878,6 @@ components:
           example: Validation Failed
         status:
           type: integer
-          format: int32
           description: HTTP status code
           example: 400
         detail:
@@ -1357,19 +1356,6 @@ components:
             - NoSchedule
             - PreferNoSchedule
             - NoExecute
-    ValidationConstraint:
-      type: string
-      enum:
-        - required
-        - min
-        - max
-        - min_length
-        - max_length
-        - pattern
-        - enum
-        - format
-        - unique
-      description: Validation constraint types for field-level errors
     ValidationError:
       type: object
       required:
@@ -1383,14 +1369,24 @@ components:
         value:
           description: The invalid value that was provided (if safe to include)
         constraint:
-          allOf:
-            - $ref: '#/components/schemas/ValidationConstraint'
+          type: string
+          enum:
+            - required
+            - min
+            - max
+            - min_length
+            - max_length
+            - pattern
+            - enum
+            - format
+            - unique
           description: The validation constraint that was violated
+          example: required
         message:
           type: string
           description: Human-readable error message for this field
           example: Cluster name is required
-      description: Field-level validation error detail (RFC 9457 extension)
+      description: Field-level validation error detail
   securitySchemes:
     BearerAuth:
       type: http
diff --git a/schemas/gcp/swagger.yaml b/schemas/gcp/swagger.yaml
index c8854dd..0d44baa 100644
--- a/schemas/gcp/swagger.yaml
+++ b/schemas/gcp/swagger.yaml
@@ -1014,7 +1014,6 @@ definitions:
       status:
         description: HTTP status code
         example: 400
-        format: int32
         type: integer
       timestamp:
         description: RFC3339 timestamp of when the error occurred
@@ -1509,26 +1508,23 @@ definitions:
       - key
       - effect
     type: object
-  ValidationConstraint:
-    description: Validation constraint types for field-level errors
-    enum:
-      - required
-      - min
-      - max
-      - min_length
-      - max_length
-      - pattern
-      - enum
-      - format
-      - unique
-    type: string
   ValidationError:
-    description: Field-level validation error detail (RFC 9457 extension)
+    description: Field-level validation error detail
     properties:
       constraint:
-        allOf:
-          - $ref: '#/definitions/ValidationConstraint'
         description: The validation constraint that was violated
+        enum:
+          - required
+          - min
+          - max
+          - min_length
+          - max_length
+          - pattern
+          - enum
+          - format
+          - unique
+        example: required
+        type: string
       field:
         description: JSON path to the field that failed validation
         example: spec.name