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Description of problem:
QGA version can't be upgrade directly without uninstalling old version for now, 


Version-Release number of selected component (if applicable):
mingw-qemu-ga-win-102.x above


How reproducible:
100%

Steps to Reproduce:
1.bootup windows guest
2.install an old version of qga from virtio-win-prewhql/virtio-win two kinds of packages. 
3. try to upgrade qga version,(Note: for virtio-win, I used installer.exe to install qga. still hit this issue)

Actual results:
qga upgrade operation is failed

Expected results:
qga can be upgraded directly without uninstalling the old version.
Additional info:

Reproduce this issue with the following two version of qga-win
mingw-qemu-ga-win-102.4.0-0.el8
mingw-qemu-ga-win-102.5.0-0.el8

Steps to Reproduce:
1.bootup windows guest
2.install an old version of qga  
3. try to upgrade qga version.

Actual result:
upgrading is failed
Expected result:
upgrading should be successes

Verify this issue with the following two versions of qga-win
mingw-qemu-ga-win-102.6.0-0.el8 ----> fix version
mingw-qemu-ga-win-102.5.0-0.el8

steps to verify as above

Actual result:
upgrading is successes
Expected result:
upgrading should be successes

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (virtio-win bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2021:4341