Had global dictionary variable in Jupyter Notebook with 42k entries and I accidently wrote over it. Is it possible to recover that previous value?

Question

So i had something like this:

my_dict = ['key':['entry1', 'entry2',...,'entry42k']]

In trying to update the list values I wrote over it with a completely new list that I did not want to use. So my_dict is now:

my_dict = ['key':['wrongentry1',...,'wrongentrynot42k']

If I am going to restore the old list manually it would take days. I am incredibly stupid for not saving my variable in a file, but I would love to know if there's a way to get my old dictionary value back. I'm also on windows if that helps.