Unused lists can be deactivated in the List Management area of Settings. This prevents the list from being coded onto the invoice, which could lead to sync errors.

How to deactivate a list

Navigate to Settings - List Management. Select the Legal Entity and the unused list. When viewing the list, toggle Active to No. A message will pop up asking you to confirm your choice, click Yes to successfully deactivate the list.  

This option can only be used to deactivate an entire list. To deactivate a specific list item, deactivate the item in your ERP first and run a sync. To reactivate a list, toggle Active to Yes and click yes in the pop-up message.