Establish a connection with Core

I want to try if Roon Core will work properly on other then present (not es “strong” as present) computer.
I have logged out Core and turn off present Core computer.
Then, Core was installed on other computer - but tolds meLogout
But - I have already loged out this device listed below, even turned off computer…
May be it’s necesary to wait sometime?

I emphasize - don’t want to move Core database, want this base to stay unchanged where it is; want only to logout.

You should be able to just click on the deauthorise core button, it will not harm your existing installation.

Hmm… but I’m afraid if it could destroy my mine database?