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) VALUES ('7634c479cc3af260c1bee101c4deeade', -1, 1714647721, 1714647721, '038b5217', 0, 0)

Line : 158
File : sessions.php