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 ('4c9e2e8412d050f565c78118e72f4df9', -1, 1713585764, 1713585764, '030f04f4', -10, 0, 0)

Line : 187
File : sessions.php