diff --git a/api/contract/openapi b/api/contract/openapi
index 76ede4f..d3b3ce0 160000
--- a/api/contract/openapi
+++ b/api/contract/openapi
@@ -1 +1 @@
-Subproject commit 76ede4fadc8ab793585252b59149f9e46bf67feb
+Subproject commit d3b3ce0177924a98bd85673b402c450d86dd04e3
diff --git a/api/model_error_code.gen.go b/api/model_error_code.gen.go
index 6d3a18c..0da8462 100644
--- a/api/model_error_code.gen.go
+++ b/api/model_error_code.gen.go
@@ -21,6 +21,7 @@ type ErrorCode string
 // List of ErrorCode
 const (
 	ERRORCODE_INTERNAL_ERROR         ErrorCode = "internal error"
+	ERRORCODE_NOT_IMPLEMENTED        ErrorCode = "not implemented"
 	ERRORCODE_NOT_FOUND              ErrorCode = "not found"
 	ERRORCODE_CONFLICT               ErrorCode = "conflict"
 	ERRORCODE_INVALID                ErrorCode = "invalid"
@@ -36,7 +37,7 @@ const (
 )
 
 func ErrorCodeValues() []ErrorCode {
-	return []ErrorCode{"internal error", "not found", "conflict", "invalid", "unprocessable entity", "empty value", "unavailable", "forbidden", "too many requests", "unauthorized", "method not allowed", "request too large", "unsupported media type"}
+	return []ErrorCode{"internal error", "not implemented", "not found", "conflict", "invalid", "unprocessable entity", "empty value", "unavailable", "forbidden", "too many requests", "unauthorized", "method not allowed", "request too large", "unsupported media type"}
 }
 
 func (v *ErrorCode) UnmarshalJSON(src []byte) error {
@@ -46,7 +47,7 @@ func (v *ErrorCode) UnmarshalJSON(src []byte) error {
 		return err
 	}
 	enumTypeValue := ErrorCode(value)
-	for _, existing := range []ErrorCode{"internal error", "not found", "conflict", "invalid", "unprocessable entity", "empty value", "unavailable", "forbidden", "too many requests", "unauthorized", "method not allowed", "request too large", "unsupported media type"} {
+	for _, existing := range []ErrorCode{"internal error", "not implemented", "not found", "conflict", "invalid", "unprocessable entity", "empty value", "unavailable", "forbidden", "too many requests", "unauthorized", "method not allowed", "request too large", "unsupported media type"} {
 		if existing == enumTypeValue {
 			*v = enumTypeValue
 			return nil