I am using Item Group instead of Kit. But why am I getting the error: 'You cannot edit the end of group line. You must delete the group.' when I try to save an Invoice from the Next Bill button on Sales Order page? I do not want to uncheck "Reference Start/End Lines on Picking Ticket". Is there another way around this?

Do you have any scripts or workflows running on the Invoice items sublist?

@AI1 yup we have a few.

We had this same issue and it was a workflow that was trying to update the end of group line. We had to put a condition to only update items in the sublist that were not description items or did not contain “End of Group” Try turning of all the scripts then turning them back on one by one to test which one is causing the error

okay thank you @AI1 I'll try that