indigo

Hi there, I am currently on a 457 sponsorship visa and will shortly be applying for a partner visa. I was on a 417 WHV previously, which would have expired in February next year. Is it possible to cancel the 457 that I am on and revert back to the 417? (if that is possible I would be looking at applying for the partner visa after the change and have the bridging visa apply to the 417) Thanks in advance!