Issue Summary

When an import is created and the "Automatically create object types and attributes" option is enabled, doing so can result in an existing object type's label being deleted and replaced with another new attribute.

Steps to Reproduce

1. Create an import with a few attributes, using a CSV file. Enable the "Automatically create object types and attributes" option. Include at least 1 "Name" attribute which will be created as the label.
2. Run the import to create some objects.
3. Modify the CSV file to remove the "Name" attribute.
4. Create another import in the same manner as step 1, using the same CSV file name (so that it targets the same object type).

Expected Results

Attributes should be additively added and the existing label on the object type should not be affected.

Actual Results

The existing label ("Name") attribute of the object type is deleted and replaced with a new label attribute from another CSV column name.

This results in errors described in https://confluence.atlassian.com/jirakb/something-s-gone-wrong-error-when-viewing-objects-in-an-object-type-1251411097.html.

Workaround

Use a different file name so that a new object type is created instead of modifying an existing one.