You can disassociate a template from multiple instances by performing the following steps:
Go to the template’s details page.
Click the Applied to tab.
Select the instances that you want to disassociate from the template.
Select one of the following options:
Selecting the Only remove template association option will leave all existing metrics that were created from the template in place and will continue to collect data.
Click Remove. The instance/instances should disappear from the table after a few seconds.