Fix hda updating when it shouldn't

lib/galaxy/model/__init__.py

@@ -5038,7 +5038,7 @@ def __create_version__(self, session):
 
             # hist.deleted holds old value(s)
             changes[attr.key] = hist.deleted
-        if self.update_time and self.state == self.states.OK and not self.deleted:
+        if changes and self.update_time and self.state == self.states.OK and not self.deleted:
             # We only record changes to HDAs that exist in the database and have a update_time
             new_values = {}
             new_values["name"] = changes.get("name", self.name)