Why cant I unlink my old microsoft account from my PlayStation? I cant sign into the...

I need to unlink my PlayStation Network account from my old Microsoft account which I don’t remember, & link it to a new Microsoft account to play Minecraft

You can unlink the psn account however you CANT link a different one.

Note: Once a Microsoft account has been linked to a PlayStation® account, neither the Microsoft account nor the PlayStation™ Network account can be associated with a different account. 

If you choose to unlink accounts, then purchases will be returned to the account which made the purchase. Even after unlinking, Microsoft and PlayStation® accounts can only be re-linked to the original account.

This is coming right from the Minecraft website

https://help.minecraft.net/hc/en-us/articles/360037725571-Minecraft-for-PlayStation-TM-4-FAQ

How do i unlink a playstation account from windows?

I linked my wifes Microsoft acount to my ps4 by a accident. Is there a way to unlink hers so i can link mine. Pls

I did the same thing but i have two accounts but i didnt remember which account was my best microsoft account and then i choose the wrong account but i cant unlink the wrong account is there a way on the microsft page to unlink the ps4 account?
Something alike happend to me. I was signing in my Microsoft account in the new updated Minecraft. But when I tried to sign in it said that my account was signed in to annother PSN account so I don't know what to do because I had never used my Microsoft
account on any PS4. I need help!!!!!!!!!

How do i unlink a playstation account from windows?

I linked my wifes Microsoft acount to my ps4 by a accident. Is there a way to unlink hers so i can link mine. Pls

I did the same thing but i have two accounts but i didnt remember which account was my best microsoft account and then i choose the wrong account but i cant unlink the wrong account is there a way on the microsft page to unlink the ps4 account?

How do i unlink a playstation account from windows?

I linked my wifes Microsoft acount to my ps4 by a accident. Is there a way to unlink hers so i can link mine. Pls

I did the same thing but i have two accounts but i didnt remember which account was my best microsoft account and then i choose the wrong account but i cant unlink the wrong account is there a way on the microsft page to unlink the ps4 account?
Something alike happend to me. I was signing in my Microsoft account in the new updated Minecraft. But when I tried to sign in it said that my account was signed in to annother PSN account so I don't know what to do because I had never used my Microsoft
account on any PS4. I need help!!!!!!!!!

Update. I was just triyng to make anew account (which I did) but I couldn't sign in with this one either, even though it was 100% new. I'm pretty sure this is a problem with the Minecraft itself.

Hello My Microsoft account had been deleted because I got hacked and i try to create a new one and use the new account to play minecraft on my PlayStation 5 and When i try to login with my new account it says that i need to login with my old account but it’s deleted is there a way so i can login with my new Microsoft account on my ps5 without create a new PlayStation account

Unfortunately you cant link a different Microsoft account.

Per https://help.minecraft.net/hc/en-us/articles/360037725571-Minecraft-for-PlayStation-FAQ#h_01FANTJZAHV8KA7ZHC1EXBXYH2

Note: Once a Microsoft account has been linked to a PlayStation® account, neither the Microsoft account nor the PlayStation™ Network account can be associated with a different account. 

If you choose to unlink accounts, then purchases will be returned to the account which made the purchase. Even after unlinking, Microsoft and PlayStation® accounts can only be re-linked to the original account.