phpBB : Critical Error

Error updating sessions table

DEBUG MODE

SQL Error : 2013 Lost connection to MySQL server during query

UPDATE giomaffy_phpbb_users SET user_session_time = 1714404672, user_session_page = -1, user_session_topic='0', user_totalpages = user_totalpages+1, user_totaltime = user_totaltime+(1714404672-1714404669) WHERE user_id = -1

Line : 313
File : sessions.php