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 ('3e3b817b2284e42bee4e87ef403a27ac', -1, 1712949384, 1712949384, '03eeaebf', 0, 0, 0)

Line : 187
File : sessions.php