first I come from china. so my English not so good.I hope you can understand.
I see that sessionid is calculate by:
$sessionid = md5(time().$password.$name.rand(0, 10000000));
at: include/classes/api/services/CUser.php
if the value of sessionid is such as 1234e5678....... then execute insert sessions ..... values();
An error occurred at mysql
the error: Illegal double '' value found during parsing.
you mast know that means.