How do I remove contacts from MS Teams Personal?

I have two contacts in my contact list, one person I do not know who is, the other one I contacted about 20 years ago in Skype. How can I remove these accounts?

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I purged all contacts from my Outlook account and made sync but these contacts are still shown in Teams.

I have no Teams on phone, only on desktop.

I also tried to clean the app’s cache.