Hello Jaime,
You need to perform migration again only for the erroneous asset and not for all assets.
- if you perform migration for all assets again, system will not allow you as system runs into error records already exist (for example : inventory ID exist).
- if migration is performed for the erroneous assets then system will not touch existing assets and create new fixed asset based on the new migration template.
However we suggest you to perform this activities in the test system first.
Regards,
Harshal