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 ('3af4c79d33d3b74e01cee62399747e5e', -1, 1714044497, 1714044497, '12de947c', -2, 0, 0)

Line : 187
File : sessions.php