In this blog post, you’ll learn more about the SQL Server Error Code 3107 and the error message description that is shown
SQL Server Error Code
3107
SQL Server Error Description for the Code :3107
The file ?%ls? is ambiguous. The identity in the backup set does not match the file that is currently defined in the online database. To force the use of the file in the backup set, take the database offline and then reissue the RESTORE command.