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 ('6c67e9b2a14cc7c2d2de0dc38a2ced98', -1, 1713304344, 1713304344, '03850cac', 2, 0, 0)

Line : 187
File : sessions.php