Sorry, but an error occurred

Query error.
Query is:DELETE FROM alex_livre_sessions WHERE session='4a008eace9d259ebd8e4e99a0dce122f
Error 1064
Error message: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ''4a008eace9d259ebd8e4e99a0dce122f' at line 1