Update or merge .pbix files

Hi Forum,

i am currently implementing a custom data connector to an cloud erp system. Now i want to offer this via download together with an .pbix file. Imaging there are 20 customer, which are using this the connector and created some reports with the measures from the .pbix file. Is there a chance to add additional measures to the .pbix file without kill the existing model and Reports. The model should be the same after adding the new measure.

Or is there another way to achieve the same aim?

Thank you very much Andy