Already downloaded episodes not recognized

Just a simple question:
I downloaded my podcast episodes to my old device. I transferred the whole database (via export function) to my new device. I moved all my downloads to the AntennaPod download folder of the new device (same folder structure, everything).

Now my already downloaded episodes are being shown as downloaded in AntennaPod, but if I want to play them it fails and I have to download them again.

Does AntennaPod not check the folders for already downloaded episodes? Is there an option to check all folders manually for the already downloaded episodes?