How to disable a particular CustomAction for previously installed version during an upgrade installation with MSI database?

I have a package whose previously installed versions contain a series of poorly designed custom actions: they do stuff that can be done out of the box. Thus I'm removing those for the future versions.
A series of bugs is casued by a condition for those custom actions - they all run the second time during an uninstall step during an upgrade. In order to circumvent the undesirable behavior I'd like to supply a Custom Action which modifies the database of a previously installed application if one was detected.

Given an application name, version and custom action name, how can I disable it for an uninstall step during a custom action on upgrade?

Solution 1:

You need to amend the 'Condition' of the InstallExecuteSequence/InstallUISequence for the Custom Action of the cached (installed) MSI. An example can be found here, which searches for the cached MSI based on the ProductCode and amends the Condition of a Custom Action in the InstallExecuteSequence:

https://www.alkanesolutions.co.uk/2012/12/08/editing-msi-files-in-the-windows-installer-cache/