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Sorting on field '{0}' of table '{1}' is not backed by a key and may perform poorly on large tables. Because '{0}' is added by table extension '{2}' in another app, add a key that includes '{0}' to table extension '{2}', or remove the sort.
Description
The field used for sorting is introduced by a table extension in a different app, so a key that includes it cannot be added from the current app. Add the key in the app that owns the table extension, or remove the sort to avoid a performance penalty.