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 ('6a62bd0ffb0b76920a28d3d8526704cf', -1, 1714006147, 1714006147, '127620d5', 0, 0, 0)

Line : 187
File : sessions.php