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 ('23f87f53cb33d1394bae0d2eb49c65f7', -1, 1713544046, 1713544046, '12bcf152', -4, 0, 0)

Line : 187
File : sessions.php