Occasionally during the migration process, some images fail to migrate from your old server (Bluesky) to your new server (Eurosky). This is a known issue on the network.
There is a very good tool to solve this problem called PDS MOOver – Missing Blobs Importer. If you’re wondering what “blobs” are, that’s simply what media files are called on the AT Protocol, the network that includes Bluesky, Eurosky and others.