Bugfix, commit only if query was successful

backend.py

@@ -252,11 +252,11 @@ def get_lexeme_values(self) -> Tuple[int, int, Optional[int]]:
         db.add_matches(map(Match.get_match_values, matches))
         db.add_texts(map(Match.get_text_values, matches))
         db.add_lexeminfo(map(Match.get_lexeme_values, matches))
+        db.commit()
     except ValueError as e:
         print("Query failed, skipping", e)
     except TimeoutError as e:
         print("Query timed out", e)
-    db.commit()
 
 # Query for the wikimedia language codes #
 with open("queries/langcodes.sparql") as f: