What happens when you swap settings for allowGlobal and allowRoom?

[Spike]

I have a HipChat integration that was originally developed to be installed per room (allowRoom == true, allowGlobal == false). Changing requirements have us moving to a global install  (allowRoom == false, allowGlobal == true).

What will happen to existing installs if this change is made in the capabilities descriptor?

[Patrick Streule]

When an integration is installed globally in a group, existing room-level installations will be removed. Is your integration listed in the Atlassian Marketplace? Note that changing the allowRoom/allowGlobal would not be handled by auto-upgrade and existing users would need to re-install/approve the add-on.

[Spike]

It is in the marketplace. Would existing users be prompted to re-approve or would we need to prompt them? If they don't upgrade, would the existing configuration continue to work (presuming we handle the situation on the backend, of course)?

Thanks!