Future start job offer

I’m currently managing in South Korea and accepted a job offer from Newcastle.

wanted to finish the season with my current so set the start date for end of current season (dec 2033) and have just realised my contact doesn’t start until October 2034.

Is there any way that anyone knows of I can het started Newcastle now or at least leave my current team so I don’t have to play ⅔ of the season?