The product to be imported has a different hash than the existing one

In some cases, the ProductStore folder of a specific project contains incomplete product data that prevents you from adding a new version or a corrected version. In this case, please follow the steps below to resolve the problem.

• Close your affected project.
• Go to the project details and perform a project compression by means of the 'Compact now' link that appears once you hover the project's file size in the Project Details.

• Open the project and try to add the device again.

If the above does not work, then please try those steps below:

1. Compact your project again as explained in the previous steps.
2. Change your regional format to English (See here).
3. Go to 'C:\ProgramData\KNX\ETS6\ProductStore' and rename it to  C:\ProgramData\KNX\ETS6\ProductStore_new').
4. When ETS has restarted, add the device to your project.
5. Change your regional format back to your system's language.