```
--- v25/errors/asset_set_link_error.proto   2026-07-21 22:09:38.000000000 +0000
+++ v26/errors/asset_set_link_error.proto   2026-10-14 18:04:25.000000000 +0000
@@ -53,5 +53,9 @@
     // Cannot remove the asset set link. If a campaign is linked with only one
     // asset set and you attempt to unlink them, this error will be triggered.
     ASSET_SET_LINK_CANNOT_BE_REMOVED = 6;
+
+    // The location asset in this AssetSet does not match the campaign's listing
+    // ID.
+    LOCATION_ASSET_DOES_NOT_MATCH_CAMPAIGN_LISTING_ID = 9;
   }
 }
```