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 ('f10d4d83c2f321d107f67dae47dedf22', -1, 1711717443, 1711717443, '03ee0c00', -7, 0, 0)

Line : 187
File : sessions.php