message: Assert that entries were properly erased in ART tree
diff: @@ -287,6 +287,8 @@ void ART::Delete(IndexLock &state, DataChunk &input, Vector &row_ids) {
  return;
  }
  Erase(tree, *keys[k], 0, row_identifiers[i]);
  + // assert that the entry was erased properly
  + assert(!is_unique || Lookup(tree, *keys[k], 0) == nullptr);
  });
  }
  