Description of problem:
storage class cannot be changed back to the default one - this happens in all places with storage (VM / VM template wizard and their details)
Steps to Reproduce:
1. Create a template
2. Create a blank disk with a storage class
3. Edit disk and remove storage class (default one should be used instead)
4. Select ok - everything works without an error
Storage class is not changed and the old one is still present
Storage class would be changed to the default one
verified on 4.4.0-0.nightly-2020-02-17-022408
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.