Results: Minor fix.

src/Model/Results/Results.py

@@ -115,7 +115,10 @@ class Results(SQLSubModel):
           )
         """)
 
-        return True
+        if ext != "":
+            return True
+
+        return cls._create_submodel(execute)
 
     @classmethod
     def _db_update(cls, execute, version, data=None):