Hope you are doing well
In your windows machine, go to below location:
c:\users\suraj shankar\virtualbox vms\edureka_vm-python\
And delete all the files present inside it.
After this, try to import the python vm.ova file once again.
Hope this resolves your query
In case of any further issue,feel free to revert.
Kindly give your valuable feedback by clicking on any one of the smiley's below.