phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 2006 MySQL server has gone away

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('10eb5b314d51e9e768f75c14e6d39db3', -1, 1638880777, 1638880777, '3417db0c', -10, 0, 0)

Line : 187
File : sessions.php