sequence

If you are running a Drupal multi-site installation, and the sequence tables are shared, then here's an admonition: take real care of the changed prefix for each shared database. Cross check on the sequence tables if you ever had to rename the database or just the unshared tables. For instance, [dbprefix_dbname] becomes [dbprefixnew_dbname] The first thing you have to do is go check the sequence table and change the values manually on the new sequence table entries corresponding to the database appropriately.