Thanks for the clarification, @BethV.
Yes, you’re right. Moving the items from one line to another is currently unavailable in QuickBooks Desktop.
Since you encounter an unrecoverable error when deleting and replacing it, I recommend performing some troubleshooting solutions to isolate and fix the issue. You can start by identifying how many users are affected.
Create a different log in details and use it to open the same company file. If the problem only happens in one specific user, that credential might be damaged.
Let’s recreate it for regular users. Here’s how:
Once done, log off the company file and sign back in using the new credentials. However, if the damaged user is an Admin, download and run the QuickBooks File Doctor. Follow the steps below:
Check out this article for the detailed steps: QuickBooks File Doctor.
I'm also adding some articles with other troubleshooting solutions that can help resolve the issue:
Reach out to me if you need assistance with anything else. I'm more than happy to help. Wishing you the best!