/errors/asset_error.proto 

--- v25/errors/asset_error.proto    2026-10-26 16:32:21.000000000 +0000
+++ v26/errors/asset_error.proto    2026-10-26 16:32:26.000000000 +0000
@@ -179,5 +179,9 @@

     // The customer is not in the allow-list for Business message asset type.
     CUSTOMER_NOT_ON_ALLOWLIST_FOR_MESSAGE_ASSETS = 46;
+
+    // The partner promotion ID is set as the oneof variant (int_value or
+    // string_value) that this account's promotion integration does not accept.
+    PARTNER_PROMOTION_ID_TYPE_INCOMPATIBLE = 47;
   }
 }