One Integration, Multiple HA Installs

I have Smartthings (ST) integration working (under HA v116.4) mostly without issues. I now want to create a copy of my HA install and run it on a separate RaspPI and use it as a test environment. The 2nd install is a mirror of my main install with the exception of the IP address. Here is the problem:

When my test install started up I lost my ST integration on my main install. Even after shutting down the test and restarting the main could I reconnect to ST. I had to delete ST Integration and start over.

My question is: Is it even possible to have one ST integration (same ST Account) running on more than one RaspPi at the same time?