Error Message when previewing a form

Please assist as this error message is popping whenever i want to preview my form:
“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”

Welcome to the community @simbakhosa92! Try validating your xlsform here. Doing so you should be able to identify the issue within your xlsfrom. To learn more on allow_choice_duplicates please have a look at our post that has been discussed previously:

If you are still not able to solve your issue, please feel free to share your xlsform with the community. The community would help you solve your issue.