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 ('4e79b4950b33581049d16e91323fcb90', -1, 1748520708, 1748520708, '12dff7a4', -4, 0, 0)

Line : 189
File : sessions.php