Hi There,
The warning MSG is only displayed there for you to see in the admin.
This has no effect with Zen Cart and people buying. It is only to warn you that you have selected the option that anyone who purchases from your online shop will be told that shipping is free when they go through the purchase process. Providing you are sending people their product for free then this is fine.
It is best to leave this on as it would require manual editing. Also down the track if you remove the warning you may not be warned if you are stuffing up something!
Just ignore it.



