Hi there rositagl!
I have an article here for you that addresses that issue, and can provide some helpful troubleshooting steps as well:
You may also need to delete the offending files and re-download them from your past purchases history, more information on which can be found here:
If these articles fail to resolve the issue, you should report an issue with your purchase by following the information located in this article:
Thanks for using the Apple Support Communities. Have a good one!