How to reset viewScope for a particular ADF region

I have following usecase.
I navigate to a page (say cloud home page). while calling this page couple of parameters are set in view scope.
1. viewScope.keyAttrs.target
2. viewScope.keyAttrs.type
The page has a ADF region ( say inventory) embedded.
For this region I want above parameters in view scope to be null. Can I set a flag or something to make it null?

My requirement is specific to Enterprise Manager so closing the thread.

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