Fatal error: after update to 1.4.12

[bastibilder]

After updating from 1.3.5 to 1.4.12 I received a 'Fatal error' with the following debug message:

While executing query "delete from `db1033503-basti`.2_cpg135_sessions where time<1184034996 and remember=0;" on Resource id #6
mySQL error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.2_cpg135_sessions where time<1184034996 and remember=0' at line 1

I am not an SQL insider so every help is appreciated.

The web address of the gallery is basti.wir-sind-unterwegs.de

Thank you!

Sebastian