Thanks for joining in on this thread, MidwestS.

I'd like to share some steps to help with your situation.

After creating the new item, you'll want to merge them to the old one. Before doing so, please make sure to backup your QuickBooks Desktop company file. 

Then, follow these steps:

1. Go to Lists > Item List and find the item you want to merge.
2. Copy the name of the entry you want to keep.
3. Right-click the entry you don’t want to use, then select Edit Item.
4. Paste the name you copied, then hit OK.
5. Click Yes when prompted to merge the entries.

Here's an article that you can use as a reference: Merge list entries in QuickBooks Desktop.

Please feel free to reach out to us again if there's anything else you need. We're always around to help. Keep safe!