Colab pro gives a ^c after 2 hours of executing a cell - google-colaboratory

I have been using Google Colab pro to train a yolov4 model. Previously, I was able to run training for more than 12-15 hours easily, but off late, the cell executing the training stops after one or two hours with a "^C" .
Any ideas how I can avoid this or why this might be happening?

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Error message:
Your session crashed after using all available RAM.
Runtime type - GPU
I have hereby attached the screenshot of logs.
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