/errors/customer_client_link_error.proto 

--- v22/errors/customer_client_link_error.proto 2026-03-19 17:15:56.000000000 +0000
+++ v23/errors/customer_client_link_error.proto 2026-03-19 17:16:04.000000000 +0000
@@ -60,5 +60,13 @@

     // Client has too many managers.
     CLIENT_HAS_TOO_MANY_MANAGERS = 9;
+
+    // You have reached the maximum limit of accounts that can be created for
+    // this account.
+    MAX_CUSTOMER_LIMIT_REACHED = 10;
+
+    // This account cannot create new client accounts due to a Google Ads policy
+    // violation.
+    ACCOUNT_CREATION_POLICY_VIOLATION = 11;
   }
 }