How to not migrate data that's already in the data store?

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1

There is imported data (from RDB) in the data store that I don’t want to migrate and would like to import from RDB again, because I changed the data type of this data.
In the migration file I described this for the specific collection:

'<collection name>': collection = <!""!> none

When deploying this unfortunately results in a job fail:

Unable to load instance data. Error initializing dataset. Unknown property <...> found in dataset at <...>.

How to resolve this?

2

This means your migration ‘from’ model does not match the actual dataset that you are migrating. You will have to add this unknown property to your ‘from’ model in order to run the migration correctly.