How can we block a container from starting

Issue

• We have three nodes fabric ensemble. We would like to have Prod DR containers in UAT enviroment, but we want to make sure that the DR containers don't accidentally start. We tried to modify the instances/instance.properties and prefix the "item.5.name = my_container_name" with block keyword for example "item.5.name = block_my_container_name" this seems to work fine, but we are not sure if it is ideal solution.