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 ('3f1599495573c29e037069825d217c5b', -1, 1730419983, 1730419983, '0d3abbf0', -9, 0, 0)

Line : 195
File : sessions.php