How do I update my child's email address for Xbox, without deleting the profile?

We deleted my profile that had this email address so how do I do this?

I never talked about merging accounts. All I was asking is whether a gamertag can be moved onto another account that does not have Xbox Live? For example can an Xbox Live gamertag profile be moved to a different email address from the present Microsoft
Account (email) and then be able to safely delete the Microsoft Email address without it erasing the Xbox/GFWL profile?

If that's not the case the system is pretty terrible. People are complaining on the video above that I posted that their Xbox Live profile was assigned to their mums/dads emails and they wanted to transfer it to their email, but they are saying this is not
possible and that it was only once possible on the Xbox 360. But since I don't have an Xbox 360 I don't know how else to transfer a gamertag profile into another email.

I would like to delete my live.co.uk email address due to email spams. There seems to be no way to individually delete that email address from the Microsoft Account without deleting the entire Microsoft account along with email, one drive, skype, etc. I will
obviously lose my Xbox/Games for Windows Live achievements, game licenses, etc.

I was asking whether there was a solution to this problem. Otherwise I will be permanently doomed between sacrificing my Xbox/GFWL profile over an email address being bombarded with email spams. Or alternatively I bite the bullet and delete everything. Obviously
I don't want to have to delete my entire Microsoft Account and start from scratch.

I use my email all the time. My email is attached to my sons xbox game pass.

How do I replace it without losing my email address with his or affecting how I sing into my email.

Is the existing email a Microsoft email? If it is then you can't remove it without your email being deleted forever.

Per https://support.xbox.com/en-US/help...nt/change-email-sign-in-for-microsoft-account

Warning When removing an email alias that’s connected to a Microsoft domain (such as @Outlook.com, @Live.com, or @Hotmail.com), that email is completely deleted from our systems and can’t be used to send or receive emails. It won’t be available for use again as an alias on another account. Microsoft doesn’t recycle email addresses, so it can’t be reclaimed at a future time.

My daughter plays Minecraft under her brother's email address.

My son plays Minecraft under my email address.

Both children want to use their own email address without losing their profiles.

I don't understand how adding an alias will work. I don't want to delete my Microsoft account. I want to change the email associated with Minecraft only.

Is there any way to simply update the email address associated with my profile? The email address is no longer active. Or do I have to create an entirely new microsoft account to update it? Both the above links are instructions how to change the account
to a new account. I just wish to update my email address therefore updating my log in.