Using Office Add In on different environments

I am trying to create some documents using Word templates. Everything works fine on our test environment, but doesn't when I try to connect to our production environment. I guess the problem is because tables in my datasource have different Table IDs among environments. Could that be the case?

Is Word Add In saving datasources using Table Id or by table name?

When I use standard table like CustTable, switching works just fine.

Thanks for your help.

Matija