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 ('bfa1bed3d10925c7a036c2aa9dd01efa', -1, 1714029108, 1714029108, '0395ef6e', -10, 0, 0)

Line : 187
File : sessions.php