@Patzl92 Thanks for posting in our Q&A. From your description, I know that you want to deploy an older version app to the android device. If there is anything misunderstanding, feel free to let us know.
From the supported app types to Android, it seems only LOB app could choose the app installation package file and deploy the specific version. However, LOB apps only can be directly deployed to Android administrator enrolled devices. We can read the following article to find more information about app deployment:
https://learn.microsoft.com/en-us/mem/intune/fundamentals/deployment-guide-platform-android#deploy-apps
For the same Package ID, maybe we could try to change this ID. It is better to contact the google play support for more effective help. Here is the support link:
https://support.google.com/googleplay/android-developer/?hl=en#topic=3450769
Thanks for understanding.
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