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 ('eefc42dfcb8a88c66e9f8185c7fa8cb4', -1, 1780600510, 1780600510, 'd849d82b', 3, 0, 0)

Line : 189
File : sessions.php