Choice duplicate

Hi, When I try to preview my form, I get the error message: “There does not seem to be a allow_choice_duplicates column header defined in your settings sheet. You must have set allow_choice_duplicates setting in your settings sheet to have duplicate choice list names in your choices sheet.” Another, perhaps related, problem is that the changes I do with the choices do not show up in the XLM Values even after I save and redeploy the from.

I know that others have asked this question before me and gotten help from you to resolve the problem, but I’m unable to use the previous conversation to solve my problem. Perhaps it’s because I am on the insight level of “chose and click”, and don’t really understand how the program works…

My form worked fine until two days ago, when I added some questions to it. The research team is set to start the data collection next week, so I’m a bit desperate to fix this fast.

Help would be highly appreciated!

Regards,
Maggi