Sync Error: The name supplied already exists

If you're creating a new client or vendor and get the following error message in your QuickBooks transactions log:

QuickBooks Response: The name supplied already exists. Another customer, vendor or employee is already using this name.

It means that there is another object in QuickBooks with the same name so QuickBooks will not accept the duplicate. In order to fix this, edit the name of the client or vendor that is returning the error and it should sync correctly: