Hi

I'm migrating from Drupal 6 to Drupal 7.

I've done a "files" migration and a "storynode" migration so far.
On the story node there is a field called "field_teaserimage". This field has a description in the "field_teaserimage:data" field (serialized). In prepareRow() I have unserialized this value in a seperate field called "field_teaserimage_description"

Now I try to import this description to the File Entity of the corresponding media field. I can access the description only during the node migration. How can I import data to the according file entity (which can be found via SourceMigration "files"?

During the file migration I cannot access the "field_teaserimage_description". Does anyone know how to handle this? Updating a File Entity from a node migration? I spent hours and I really appreciate any hints or ideas.