How to remove redirect to netcat?

Question

PHP

Good afternoon. There are several domains on the server. At one point, without any changes in the configuration (including after downloading the backup, which alerted me), all sites on Netcat stopped opening - they began to redirect to the main page of another site.
checked in a special tool - 302 redirect. htaccess doesn't say it anywhere. I did not find it in the file structure.
there are suspicions that the engine has self-updated (as VP sometimes does) and something has crashed.
there are no other versions.
stupid question but still - what could it be, has anyone come across?