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 ('f339ada3e3ee6cddb1e6f4bfa2ff1ba4', -1, 1713539548, 1713539548, '03919ab2', 5, 0, 0)

Line : 187
File : sessions.php