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 ('1ffd70dfc242ee50c7b11c1de090a95d', -1, 1713247764, 1713247764, '0395eafb', -4, 0, 0)

Line : 187
File : sessions.php