message: Fix for verification
diff: @@ -592,6 +592,8 @@ bool ConnectBlockZC(CValidationState &state, const CChainParams &chainparams, CB
  else {
  pindexNew->accumulatorChanges[denomAndId] = make_pair(accumulator.getValue(), 1);
  }
  + // invalidate alternative accumulator value for this denomination and id
  + pindexNew->alternativeAccumulatorChanges.erase(denomAndId);
  }
  }
  else if (!fJustCheck) {
  