Summary

The CSV import does not work when trying to clear an existing issue resolution.
As the import work to set a resolution on any issue it should work the other way as well.

Steps to Reproduce

1. Create a test project and a test issue
2. Set a resolution to the issue
3. Import a CSV like the following:

   Key,Summary,Resolution
   TEST-1,Test,Unresolved
   

4. Select the mapping option for the resolution field
5. At the mapping page use the "Import as blank" option which should refer to the un-set resolution:
   

Expected Results

The import should finish and the issue TEST-1 have its resolution cleared.

Actual Results

The import finishes and the resolution is not cleared for the issue.

Workaround

Use the HowTo: Bulk Clear Resolution KB and clear the resolution through a transition.