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 ('43b7e06db96df607e920c7c6f381c3ec', -1, 1711621246, 1711621246, 'ae813bc6', -10, 0, 0)

Line : 187
File : sessions.php