From this image, you are using the legacy “Spiceworks Desktop” or “Spiceworks Inventory and Help Desk” version. In the English version, the phrase used is “Related to” and that is the device, like a workstation, tablet, phone, server, etc., you would like the ticket linked or related to. It is not for a KB article.

If you have multiple tickets which are related to one issue, you can create sub-tickets in the Spiceworks Desktop version. You cannot do that in the Spiceworks Cloud Help Desk version.

Do note that the Spiceworks Desktop version has been marked as end-of-life and may not function for you. You can read more about that here .

When you think about process flow, a ticket is the first item created before a resolution has been created. A KB article is generally for a resolution. I suggest creating the ticket first, then adding the KB article as the solution.