Change "My main XBOX"

If you used all 5 you have to wait 1 year, or you can try to contact an Xbox assistance aporator and see if they add other possibilities without waiting 1 year

Unfortunately if you have used all 5 Home Xbox changes and the one time extra change, then you will have to wait till it naturally resets. It only allows 5 changes per rolling 12 month period.

Sorry to say, but you have to wait for a year beginning at the first change of you home Xbox. If you already used the 5 times and the extra shot there is no option left.

it's not possible to find another or reset the change?

The design of the My Home Xbox feature allows you to change your Home Console five times per rolling twelve months period. If you have used all those changes you can apply for a one time only chance of a change as explained here here: https://support.xbox.com/en-GB/games/game-setup/my-home-xbox

Can I change my home Xbox console to a different console?

You can change which console is your home Xbox up to five times during a one-year period. This period works on a rolling basis, starting the moment you switch your home Xbox for the first time. If you reach your limit of home console switches for the year,
you’ll get a message letting you know the next available date you can change it.

Note Customer support cannot offer additional switches. If your console shows you’ve made five home Xbox switches for the year and you need assistance, select
Help when you see the message, Can’t make this your home Xbox. You may be eligible to receive an exception.

You can also get help with your home Xbox in Xbox Assist. Press the Xbox button
to open the guide, select
System > Xbox Assist, choose My Xbox Assist >
Search, and then enter My Home Xbox.

If that does not work, then unfortunately you will need to wait for the first date to roll around, so you can change again.