Steps to reproduce:

1. Have items configured like this:
2. Error occurs, all items correctly show unsupported:
   
3. Error is fixed and item starts receiving standard values:{}
   

Result:
Depended item for unknown "error" values stayed unsupported.

Expected:
Dependent item for unknown "error" values becomes supported without new value, because there was no error in master item and discard (not error) in preprocessing.