How do you get rid of knowledge categories with an empty parent ID?

[GeorgeO]

Fairly new to SN and learning through trial and error. I am outputting knowledge articles from Robohelp and publishing them to ServiceNow. It seems fairly smooth - except I end up with duplicate knowledge categories (I think) and perhaps this ends up in empty knowledge categories - which throw an error in the service portal (a dev instance).

How do I get rid of these knowledge categories that don't have a parent ID? (You can see the duplicate with an assigned parent category below).

Here are the categories in the knowledge base:

I also can't figure out how to link the Knowledge Base to a Service Portal I created.

Here's the Knowledge Base (with above categories):

But when I try to assign it to a portal, I can't find it by name/title:

What on earth do I need to do to get this to work. Explain as to a beginner, please (if you are going to tell me to get to a location in Service Now, please post basic navigation instructions to that location!). 

[shannont]

Hi GeorgeO,

I would check out this link from the SNOW documentation: https://docs.servicenow.com/bundle/washingtondc-servicenow-platform/page/product/knowledge-managemen... as it specifically mentions:

• To add knowledge bases to the Knowledge Service Portal, complete the following steps.
  1. Navigate to Service Portal > Portals, and click Service Portal.
  2. Click the Knowledge Bases related list.

• Click Edit to map one or more knowledge bases to the portal.

Note: If no knowledge bases are added, all knowledge bases are available in the portal.

If knowledge bases are mapped, only those knowledge bases are available in the portal. All search results and all widgets display results from the mapped knowledge bases only.

I hope this helps along with the other documentation you'll notice is there.