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 ('798120c754face5f8d7f7e735c6cfb5b', -1, 1713938571, 1713938571, '038ec5d4', -9, 0, 0)

Line : 187
File : sessions.php