@Override
  public void deserialize(ByteBuffer byteBuffer) {
    super.deserialize(byteBuffer);

    if (ReadWriteIOUtils.readBool(byteBuffer)) {
      updatedConsumerGroupMeta = ConsumerGroupMeta.deserialize(byteBuffer);
    }

    if (ReadWriteIOUtils.readBool(byteBuffer)) {
      existingConsumerGroupMeta = ConsumerGroupMeta.deserialize(byteBuffer);
    }
  }
This is only used when the subscription info lock is held by another procedure.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/subscription/consumer/AlterConsumerGroupProcedure.java