You can't import types that already exists in DATAGERRY.
-> You created a type called router
-> You exported the original type
-> You created some objects for this type
-> You deleted some fields of this type (information of the objects is still in the database)
-> You realised, that you've done something wrong and you want the fields back with the information
-> You start the import of the type and you get an error message that you can't import the type
=> So your only option is to delete the type and loose all objects ...
Has been fixed and works with the update type option