phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f2c361f572e21dc9abcfa8436b45f95a', -1, 1714517773, 1714517773, '340e554c', -8, 0, 0)

Line : 187
File : sessions.php