Hi Ryan,
The "error" shows up because you have set the qListForm in "EditListItem" mode (see ezEdit->Display tab->Form Type property).
If you add to the URL the following ?ID=1 (assuming the the list item with the ID 1 exists) qListForm will display the data for that list item and you can update this list item.
How you "fix" this without a manual intervention?
There are several ways of doing this, one popular way of doing this is to replace out of the box (OOB) SharePoint forms for New Item, Edit Item adn Display Item with qListForm web parts, hide the OOB and setup qListForm to the appropriate mode (NewItem list on the New Item for, etc) to do that for you.
Let's suppose that you replace the Edit Form with qListForm. When you go to ListView (OOB) or qListView and try to edit an item, the url will contain the ID of that item and your qListForm set to edit the item will work correctly displaying the data and allowing you to update the info you want.
Please check the documentation and the videos related with this web parts.
If you still have questions please let me know.
Thanks,