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 ('cd1dd9bf506f3c61f0173cfb4a9c592b', -1, 1714148659, 1714148659, '1276020f', 2, 0, 0)

Line : 187
File : sessions.php