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 ('d72b500a49c11b5a957cf277a75bbe3c', -1, 1757135807, 1757135807, 'd849d8a2', -9, 0, 0)

Line : 187
File : sessions.php