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 ('4db8e7f9d2b3cf2a2f413777382c1e79', -1, 1714108903, 1714108903, '030efddd', 20, 0)

Line : 158
File : sessions.php