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 ('140bd95e06d3d87a40a1f08e489c6203', -1, 1713884513, 1713884513, '0313382d', -7, 0, 0)

Line : 187
File : sessions.php