Thank you for your answer.
Do you know if family share is possible together with Test flight?
Then he could access the app over test flight.
Leobalo
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Thank you for your help!
Currently I cannot change my subscriptions because they are in Review.
Do you mean I need to create complete new ones ? So completely new identifier and change the identifier also in the app?
I answer this by myself:
the build no. must be higher than the production app version.