How can I create multiple labels for one order?

Hi, dear community!

I am trying to create two labels for one order because I have to send it in two packages. I am using Woocommerce, Germanized Pro and the DHL plugin.

I have a panel on the right side that ist DHL brandet an there is a check box with multiple labels. When I check it and choose two labels it shows me an error.

Does anyone had this issue and how did you fixed it? I will be very grateful for your help!

The page I need help with: [log in to see the link]