How do I unlink a microsoft account from minecraft playstation edition while signed out?

That's really weird, since when you unlink a Minecraft/Microsoft account from a Playstation ID it can only be linked to the same Playstation ID.

Are you completely sure you are signed in with the correct Playstation ID and trying to login with the correct Minecraft/Microsoft Account?

Hello, I hope you are well.

Please try these steps.

If the error in Minecraft on PlayStation indicates that there is a connected account and you do not remember the information, it means that the account is linked to your PlayStation Network account. To solve this, you need to unlink the Microsoft account from the game and then try to link it again.

How to unlink and relink:

1. Unlink:

Access the Minecraft settings menu on PlayStation.

Look for the option "Unlink Microsoft account" or something similar.

Follow the instructions to remove the linked account.

2. Relink:

When trying to log in to Minecraft, select the option "Sign in with Microsoft account".

Access the code redemption website on your computer or smartphone.

Enter the code that the game is displaying and log in with the Microsoft account you want to link.

If you cannot remember the email address of the Microsoft account:

Check if there is any account information saved in your browser or device.

If you can't find it, try using Microsoft's account recovery service (if the account was used for your PlayStation account, the email address must be registered

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!!!!!!!!!

I am trying to sign my son into minecraft account on ps4 &5, but it saying already signed in with a gamertag we don't recognise. I now know one of his friend's had set him up an account a while ago therefore I don't know any of the details! How do I unlink it so I can sign in with my details? Please help

Even if you could unlink the current Microsoft account you wont be able to link a different Microsoft account:

LINKING A MICROSOFT ACCOUNT TO A PLAYSTATION® ACCOUNT

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.

Source: https://help.minecraft.net/hc/en-us/articles/360037725571#h_01FANTJMTM2689F8H1VA2F559Y

Hello TheLastPlatoon07,

Thank you for posting on the Xbox forums. We understand that you are unable to unlink your Microsoft account from your PlayStation account. There is

a support article on Minecraft's support website which explains more about linking and unlinking the accounts. There is a risk involved with unlinking the accounts. The article talks more about the risks of unlinking the accounts. If you would like to continue
to learn how to unlink the account, we suggest reaching out to
Mojang support and PlayStation support. Be sure to let us know the results!