fix: Applying the same parameter as for IDs in created_by_ref UUIDs

stix2/properties.py

@@ -345,6 +345,10 @@ class ReferenceProperty(Property):
         if self.type:
             if not value.startswith(self.type):
                 raise ValueError("must start with '{0}'.".format(self.type))
+        if hasattr(self, 'interoperability') and self.interoperability:
+            if not ID_REGEX_interoperability.match(value):
+                raise ValueError(ERROR_INVALID_ID)
+        else:
             if not ID_REGEX.match(value):
                 raise ValueError(ERROR_INVALID_ID)
         return value