Thanks for your question. To help, first check if the EliteBook 8560p was fully removed from your Microsoft account at https://account.microsoft.com/devicesand not just signed out locally.
Sometimes removed devices still appear under “all devices” for a short period. Microsoft notes it can take up to 30 days for a removed device to disappear completely. If it still shows after that, contact Microsoft Support from the same page to have it cleared from your account.