wix - Should I change GUID of PatchCreation Element every time I make a new patch? -

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i made 2 sequential .msp patches .msi package test purpose(in way decribed in http://wix.sourceforge.net/manual-wix3/patch_building.htm).

first time, gave same guid patchcreation element of each patch , first patch applied original product(i see entry first patch in arp menu). but, second patch didn't apply on first patch @ all. never showed error message when launched didn't appear in arp menu , didn't update file, too.

so, changed guid of patchcreation element of second patch , recreated second patch , applied on first patch(its entry appeared in arp menu , updated files).

is right way create each patch in same patch family: should change guid of patchcreation element every single patch?

yes, uniquely identifies patch package, package/@id identifies .msi package.


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