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 ('94b36f3cff12a477b7dd88b17de9e100', -1, 1634660595, 1634660595, '12cc02e7', -7, 0, 0)

Line : 187
File : sessions.php