I'm working on a windows phone application for an event. The event has an last year's event already had a windows phone application and all I really need to do are some updates. So I made a copy of the old application and started modifying it instead of creating a new solution from scratch.
Now here's my issue: when I deploy the new event application with Visual Studio to my phone it overwrites the old application. This is something I don't want, as I want to be able to compare the two on my phone. I also suspect that this might give me some issues when I upload the application to the store.
I suspect that this has something to do with copying files that are supposed to be unique for each application.
Any help would be appreciated!
The way I fixed this was by generating a GUID id using the GUID generator in Visual Studio ( as suggested by @Robert ). And changing the GUID in the WMAppManifest.xml and Package.appxmanifest files.