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 ('d47a46080661ba39475fb31d6f38ed5d', -1, 1713500420, 1713500420, '1275b83e', -10, 0, 0)

Line : 187
File : sessions.php