Why is my .pkl flagged as unsafe?

Hi, everyone! I hope you can help me.

This is the space:
starbotica/llamaoalpaca at main (huggingface.co)

It works and the model has been trained by me, so I am positive that it has no malicious code. It is an innocent test to learn along fastai course, it is made with the example of birds and forests but with llamas and alpacas. However, the .pkl file has been flagged as unsafe.

What is the reason and what can I do to fix it? TIA.