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 ('0cd73db7c1d413772f836a1fc023400d', -1, 1714029483, 1714029483, '12bc28cf', -8, 0, 0)

Line : 187
File : sessions.php