Can't rollout my AppBundle in Google Play Store

I'm trying to update a Google Play Store build of my game (Unity 2020.1.15f1), but I cannot finish the submission because Google Play shows :

"None the of users of this APK will be able to upgrade to any of the new APKs added in this release."

I didn't make any changes in relation to any of this, has anyone been through something like this and have any idea of what may be causing it?

 

I found the issue and fixed it. Just to help others with the same kind of problem I will keep the answer here :

The Issue

The Version Code of my Current Build for some reason was LOWER than the current version available on Google Play Store.

How I fixed the issue

On Build Settings, I changed the Bundle Version Code to a value higher than the value already on Google Play Store.