You have a version mismatch between the AAB file in the CMS and in Google Play Store, and you need to change the Android Version in Google Play Store to match the dashboard.
To change the version, follow the steps below:
- Log in to Google Play Console
- Go into the desired app from All Apps
- Click the 'Edit Release' option and scroll down to find the editable version box at the end of the page
- Edit the version and click 'Save'