diff --git a/nebius/common/v1/warning.proto b/nebius/common/v1/warning.proto
index 79c2524..1df74ed 100644
--- a/nebius/common/v1/warning.proto
+++ b/nebius/common/v1/warning.proto
@@ -81,5 +81,8 @@ message Warning {
 
     // Deprecated value was observed in the response.
     CODE_DEPRECATED_SPEC_VALUE_RESPONSE = 6;
+
+    // Not-recommended value was used in the request.
+    CODE_NOT_RECOMMENDED_SPEC_VALUE_REQUEST = 7;
   }
 }