I reverted the customization on a packaged policy. Now, I am upgrading
the to latest package version. Everything works great except the filter
extension does not update. The reverted customization removed an
attribute from the filter extension. I figured upgrading the package
would put the attributes I need back in the filter extension but not
changes are made.

On a related topic, and I may have a fundamental misunderstanding of
this part, how does the filter extension and normal sync filter merge?
When I look at the sync filter, am I seeing the combination of the sync
filter and the filter extension? I do no believe so but when and how
does the combination of the sync'd attributes occur?

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