We notice that bulk edits do not work on local picklists, in the Modern UX. Following are the steps to reproduce the issue:
Expected Result:
Picklist should be selected and saved successfully.
Actual result:
Attribute Picklist is not supported Error is returned.
Due to a defect with ID DE61652.
Version: 15.9.2.
The defect has been fixed in version 15.9.3.