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 ('1c924d9d9b92b46d0df0eddbb02f724f', -1, 1713566614, 1713566614, '340e79f2', -9, 0, 0)

Line : 187
File : sessions.php