phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('397fd608168279c7f94907fb8239198d', -1, 1713967494, 1713967494, '12de4598', -4, 0, 0)

Line : 187
File : sessions.php