Hello, kevinAVS. 

I appreciate the screenshots you've provided us. This helps me identify the exact solution to fix the error you've encountered.  

The possible reason why you encountered the error message is there's a possibility that the name already exists in the system. You can go to the Products and Services list to modify the name.    

However, after changes are made, yet errors persist. I suggest reaching out to our customer support team. They use specific tools to pull up your account in a safe environment and help you identify what causes the error you've encountered.  

For your reference, please visit this article: Change product and service item types in QuickBooks Online.  

Let me know if you have any other questions or concerns. I'll be right here to assist you further. Have a lovely day and stay safe!