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 ('83ed9cc9c7610d7a26e1eae4c4db1f69', -1, 1711670558, 1711670558, '22cc3410', -7, 0, 0)

Line : 187
File : sessions.php