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 ('1d6404a5f6caaae598b102d181f73a0d', -1, 1713509764, 1713509764, '03830dc2', 5, 0, 0)

Line : 187
File : sessions.php