In this blog post, you’ll learn more about the SQL Server Error Code 21791 and the error message description that is shown
SQL Server Error Code
21791
SQL Server Error Description for the Code :21791
The table ‘%s.%s’ already appears in a transactional publication on Oracle Gateway Publisher ‘%s’. When using the Oracle Gateway option, a table published using transactional replication can only be included in one publication. To publish this table in more than one publication, you must reconfigure the Oracle Publisher to use the Oracle Complete option.