PDOException : in _basic_webmail_update_stored_message_list()

Hello and first thanks for this simple but great module,

using 2.x dev version, i have a WSOD with following error message :

PDOException : in _basic_webmail_update_stored_message_list() (line 212 in /sites/all/modules/basic_webmail/basic_webmail.list.inc).

Had no problems with version beta 1.

Hope it will help you to debug ;)

Best regards