Hello,
As far as I know, i think the delta updates in BW will be wrong as you'll delete the data to be uploaded to your BW.
Knowing this, you'll probably have to perform some full data loads in order to get the data consistency in BW back.
You should, especially on a prod system, make these data consumed by running the corresponding BW uploads.
Check with your BW team in order to make sure.
Best regards,
Steve.