TLT training warning for DetectnetV2

I am trying to retrain my detectnetv2 resnet10 network using a previously trained model file for some additional epochs. The pretrained model file is trained by retraining e pretrained .hdf5 model provided by NVIDIA.

I get this warning message before training starts -

/usr/local/lib/python2.7/dist-packages/keras/engine/ UserWarning: No training configuration found in save file: the model was *not* compiled. Compile it manually.
  warnings.warn('No training configuration found in save file: '

What does it mean? And does it affect retraining?I am doing only unpruned retraining. Hence, load_graph option is said to False.

The log is not harmful. You can ignore it.