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 ('72494fee68d5e5ea8e91ae9260742445', -1, 1638145400, 1638145400, '3417db0c', -2, 0, 0)

Line : 187
File : sessions.php