iPhone 15 missed calls notifications linked to voicemails on another device

Having IPhone 15 missed calls notifications was not going I searched all replies of community but failed Finally it struck in my mind that I am having another device which is linked to it . And on that device there were voice mails recording so this device was showing missed calls As soon as I deleted the voice mails on that device all missed calls notification vanished

[Re-Titled by Moderator]