Your network contains an Active Directory domain named contoso.com. The domain contains a
Microsoft System Center 2012 infrastructure.
You deploy a second System Center 2012 infrastructure in a test environment.
You create a service template named Template1 in both System Center 2012 infrastructures.
For self-service users, you create a service offering for Template1. The users create 20 instances of
Template1.
You modify Template1 in the test environment. You export the service template to a file named
Template1.xml.
You need to ensure that the changes to Template1 can be applied to the existing instances in the
production environment.
What should you do when you import the template?
A.
Overwrite the current service template.
B.
Change the name of the service template.
C.
Create a new service template.
D.
Change the release number of the service template.
Answer D.
https://technet.microsoft.com/en-gb/library/gg675092.aspx
http://www.aiotestking.com/microsoft/you-need-to-ensure-that-the-changes-to-template1-can-be-applied-to-the-existing-instances-in-the-production-environment/#comment-745683
If you keep the same name, it will override. Like a restore. If you change the name will be create a new. If you didn’t change the name and not restore, so you have to change the version.
If the name and the release value match those of an existing service template in the current VMM environment, you will be prompted to confirm whether you want to overwrite settings in the existing service template. Click Yes to continue, or cancel the operation and then change the service template name or release value.
You can either change the Release number or the Name of the service template.
but it is probably best to change the release number so that you can see that it is an update of all templates with the same name.