remove duplicate constraint check for usage insert

rctab/routers/accounting/usage.py

@@ -78,18 +78,13 @@ async def insert_usage(all_usage: AllUsage) -> None:
         all_usage: Usage data to insert.
     """
     usage_query = insert(accounting_models.usage)
-    update_dict = {c.name: c for c in usage_query.excluded if not c.primary_key}
-    on_duplicate_key_stmt = usage_query.on_conflict_do_update(
-        index_elements=inspect(accounting_models.usage).primary_key,
-        set_=update_dict,
-    )
 
     logger.info("Inserting usage data")
     insert_start = datetime.datetime.now()
 
     await executemany(
         database,
-        on_duplicate_key_stmt,
+        usage_query,
         values=[i.model_dump() for i in all_usage.usage_list],
     )
     logger.info("Inserting usage data took %s", datetime.datetime.now() - insert_start)