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 ('236156e59ec21d7ed2a6bb6575d820fe', -1, 1719179962, 1719179962, '22ef977c', -11, 0, 0)

Line : 247
File : sessions.php