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 ('21500806736b33f6b7710db3ca020f27', -1, 1730415930, 1730415930, '03155d8b', -1280, 0, 0)

Line : 195
File : sessions.php