changed component guid in MSI and it's causing issues

I am working on the installer for a product (currently version 3). Between versions 1 and 2 (already released), the guid of a component was changed, but the keypath adn everything stayed the same (and needs to stay the same still). In version 3, I need to make a change to move RemoveExisitingProducts later in the install sequence. However, this is exposing a new bug causing the component that had its guid changed to not be installed if upgrading from version 1 to version 3. I'm trying to figure out a way around this bug. Repairing fixes the installation but I'd rather not have to repair. I think it'll probably take some kind of hack to fix it, but I haven't been successful. I tried going to HKLM/Microsoft/windows/currentversion/installer/user data/S-15-18/components/OLDPACKEDGUID and deleting it before running the new installer, but开发者_如何学C that seems to cause terrible issues and be much worse.

anyone know a solution to this issue, even if it's a big hack? Thanks

You can try to schedule RemoveExistingProducts earlier in the sequence so that during upgrade the previous product is completely uninstalled before installing the new product.

Also look at this WiX upgrade question. And another one may also be helpful.