/errors/goal_error.proto 

--- v24/errors/goal_error.proto 2026-07-21 22:02:15.000000000 +0000
+++ v25/errors/goal_error.proto 2026-07-21 22:02:36.000000000 +0000
@@ -50,5 +50,11 @@

     // Only Google Ads account can have customer lifecycle optimization goal.
     CUSTOMER_LIFECYCLE_OPTIMIZATION_ACCOUNT_TYPE_NOT_ALLOWED = 7;
+
+    // New customer acquisition goal already exists.
+    NEW_CUSTOMER_ACQUISITION_GOAL_ALREADY_EXISTS = 8;
+
+    // Loyalty retention goal already exists.
+    LOYALTY_RETENTION_GOAL_ALREADY_EXISTS = 9;
   }
 }