Docker Image is 18.0.3 but in Settings 16.0.4

I hope someone can help me:

  • I’m running Nextcloud in a Docker Container on a Debian (OMV) based maschine
  • The Image is linuxserver/nextcloud:latest
  • I’m updating my Containers with Watchtower

According to the Image details, the NC Version is 18.0.3-ls74 (Build Date 2020-04-08), but according to the “Overview” in Nextcloud, the NC Version is 16.0.9. How is this possible?