In 1.9 Version with entity asset present, I enhanced the entity as of field description I made it translateable, so i got asset.description, asset.description_fr_ch, asset.description_it_ch.
When auto. Migrate to 1.13 with now table file, this didn’t got migrated, kind obvious.
Make sure you got a backup present, as the table asset will be delted after… (one day, not sure what the trigger for that is)
I set the field description in entity file also for multilinugal and migrated data myself from backup db. maybe that helps smbd: