Error in add and update repository in install onlyoffice community

hi
in add repository of onlyoffice, when i want to update repo and and onlyoffe i got this error and can not do anything else:
the repository https://download.onlyoffice.com/repo/debian squeeze Release does not have release file.

i asked ai and he toled me, this repo does not sopport anymore by you

adding repo in my linux in your documentation for install:
Installing ONLYOFFICE Docs for Debian, Ubuntu, and derivatives

Hello,

To check this situation on our side and understand what exactly is happening, please provide the following information:

  • Your OS version and architecture:
    lsb_release -a and uname -m
  • The contents of the ONLYOFFICE repo file:
    cat /etc/apt/sources.list.d/onlyoffice.list
  • The full output of the command:
    sudo apt update
  • Please confirm if this is a fresh installation or you had ONLYOFFICE packages installed on this server before.

With these details we will be able to reproduce the issue and suggest the exact steps to fix it.