Upgrade to Python 3.8 + duplicate check when adding in sdp

core/sheerka.py

@@ -2,7 +2,7 @@ from dataclasses import dataclass
 
 from core.concept import Concept, ErrorConcept, Property
 from parsers.PythonParser import PythonParser, PythonGetNamesVisitor, PythonNode
-from sdp.sheerkaDataProvider import SheerkaDataProvider, Event
+from sdp.sheerkaDataProvider import SheerkaDataProvider, Event, SheerkaDataProviderDuplicateKeyError
 from parsers.DefaultParser import DefaultParser, DefConceptNode
 
 import logging
@@ -200,8 +200,10 @@ class Sheerka(Concept, metaclass=Singleton):
         concept.add_codes(def_concept_node.get_codes())
         self.set_id_if_needed(concept, False)
 
-        self.sdp.add(exec_context.event_digest, self.CONCEPTS_ENTRY, concept, use_ref=True)
-
+        try:
+            self.sdp.add(exec_context.event_digest, self.CONCEPTS_ENTRY, concept, use_ref=True)
+        except SheerkaDataProviderDuplicateKeyError as error:
+            return ReturnValue(False, ErrorConcept(body=error), error.args[0])
         return ReturnValue(True, concept)
 
     @staticmethod