How to restore removed contact auto-suggestions

Hello,

I removed by mistake one contact from the list of Auto-Suggestions which appear when I click Compose, To and a part of the contact name. I want to restore it and I followed the steps indicated by Yahoo help (Click Compose, Enter the email address or contact you want to restore, Click Send). However, the contact Auto-Suggestion was not restored, although I repeated the procedure several times. Is there anything else I can do?

Thanks.