I have encountered a similar problem a few times. The problem was always a component that existed in multiple versions but had a different componentId in the newest version. Updating the componentId in the new version so that it matched the component...
I have the same problem on a customer PC, I am not able to reproduce the same error on my side. The software was upgraded to a newer version then uninstalled and the originally installed version was installed again. Thereafter this error appears when...
Well for a major upgrade the property is IS_MAJOR_UPGRADE so im assuming that for a minor upgrade the property is IS_MINOR_UPGRADE i've never used this property before though, so no garanties.