mysql error: 1005

ERROR 1005: Can’t create table (errno: 121) Help
Solution: For some reasons this error appeared for the first time and caused my mysql to drop. But it only happens when clicking on a specific table. So I recreated the table but can’t use the same name again so what i did backup everything with the new table name for that specific table and recreate the database.
It helps.  On some forum they’re actually talking of foreign keys or duplicate keys but i just recreate it.