When you try to update a Microsoft SharePoint app that you're developing by using Microsoft Visual Studio, you receive the following error message:
A different version of this App is already installed with the same version number.
To resolve this issue, use a later version number in the App element of the Appmanifest.xml file.
For more information, see Update SharePoint Add-ins.
This error can occur if you don't manually update the app version number in the app manifest file (Appmanifest.xml).
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