phpBB : Critical Error

Error updating sessions table

DEBUG MODE

SQL Error : 2013 Lost connection to MySQL server during query

UPDATE ibixan_phpbb_users SET user_session_time = 1609326464, user_session_page = 1, user_session_topic='3795', user_totalpages = user_totalpages+1, user_totaltime = user_totaltime+(1609326464-1609326436) WHERE user_id = -1

Line : 313
File : sessions.php