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 ('8ece9870da0a4c0f2ffdb3d53f6bba26', -1, 1714031026, 1714031026, '0d3b88aa', 5, 0, 0)

Line : 187
File : sessions.php