Image ID problem in Zabbix DB

[beli]

Hi there,
I'm experiencing problems when creating new images. When I try to upload a new image in Zabbix frontend, I get an error from the database saying "Key (imageid)=(25) already exists.".
I checked in the DB and yes, the first free imageid is 188. I tried to look into the PHP sources, but didn't find the place where the frontend generates IDs when creating a new images. Also there's no sequence or other generator in use on the database column imageid in table images. How can I make it use the correct next free ID?
I'm running Zabbix 2.0.5rc1 on PostgreSQL 9.1. And I confess, I may have filled the images table in a non-standard way, when converting from MySQL to Postgres.
Thanks in advance for any tips. Best regards.

[heaje]

Check the "ids" table in the database and verify that it has the correct "nextid" value for the images table. The "ids" table is what Zabbix uses to track ids.

[beli]

That's it! How could I missed that.
Thank you very much.