Retrain Rnn on same data but with a different padding size

Part 1 (2018) Study Groups 1 (2018)
1

I am trying to retrain my rnn model on the same data but with a different padding size but I am unable to do so. I had first built the rnn model from scratch with a padding size=80 but I want to retrain the same model with a padding size=120. So how do we do that?

Any help would be appreciated.
Thank You.