1213 - Deadlock found when trying to get lock; try restarting transaction

update whos_online set customer_id = '', full_name = 'Guest', ip_address = '216.73.216.156', time_last_click = '1772138608', last_page_url = '/index.php/cat/c59_Applikationen+7mm.html/XTCsid/pvte0s9gptgof2d783j923t054' where session_id = '5ieoovj23iq2t3h1uid33f7um5'

[XT SQL Error]