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 ('e68f41c71d246d0fc7a1be62e692be1c', -1, 1714176781, 1714176781, '12df1439', 2, 0, 0)

Line : 187
File : sessions.php