diff --git a/redfish-core/src/error_messages.cpp b/redfish-core/src/error_messages.cpp
index 317b9e8..8d30472 100644
--- a/redfish-core/src/error_messages.cpp
+++ b/redfish-core/src/error_messages.cpp
@@ -287,7 +287,7 @@
 
 void propertyNotWritable(crow::Response& res, std::string_view arg1)
 {
-    res.result(boost::beast::http::status::forbidden);
+    res.result(boost::beast::http::status::method_not_allowed);
     addMessageToJson(res.jsonValue, propertyNotWritable(arg1), arg1);
 }
 
diff --git a/scripts/parse_registries.py b/scripts/parse_registries.py
index 03e44cb..041b86e 100755
--- a/scripts/parse_registries.py
+++ b/scripts/parse_registries.py
@@ -250,7 +250,7 @@
         "OperationTimeout": "internal_server_error",
         "PasswordChangeRequired": None,
         "PreconditionFailed": "precondition_failed",
-        "PropertyNotWritable": "forbidden",
+        "PropertyNotWritable": "method_not_allowed",
         "PropertyValueExternalConflict": "conflict",
         "PropertyValueModified": "ok",
         "PropertyValueResourceConflict": "conflict",