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 ('5a53cf2e307f29b2d277b54de7840a95', -1, 1714608807, 1714608807, '03850cac', -4, 0, 0)

Line : 187
File : sessions.php