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 ('e96d3ed050642b059d1b2b9943a4c0c4', -1, 1747792722, 1747792722, '1275884f', 30, 0, 0)

Line : 190
File : sessions.php