Hi @NewcombR ,
Could you please share a bit more about the error when you ugrade?
Do you mean that canvas app in your managed solution set as a managed component?
Currently, if you import an managed solution into a target Environment, you could not edit the components within this managed solution.
Please refer to the following article for more details:
As an fixed solution, please consider remove/uninstall the managed solution from your Test Environment, and then import the updated managed solution into your Test Environment again.
If your solution is still under development, I think you should import your solution as a unmanaged solution rather than managed solution. Then you could continue to add and remove components to this Solution within your Test Environment.
Keep up to date with current events and community announcements in the Power Apps community.
A great place where you can stay up to date with community calls and interact with the speakers.
Check out the latest Community Blog from the community!