If you ask the same question in the same case multiple times, this is an error in most designs. Because the previous answer is displayed and overwritten.
Usually, researchers wand all answers stored, and re-using a question will "lose" answers. This is why the warning is displayed.
Yet, it's only a warning. Respondents won't see it. If you're absolutely sure (and double-checked) that the data is available in the questionnaire as you need it, then just ignore notices (yellow) and warnings (orange).
If you're not absoltely sure, you read this manual: Multi-Level Structure
Same happens with "questionnaire error messages" related to the same issue
Error messages (red) will also show up in the questionnaire when a respondent answers. The above message will not appear as error. So, if any errors show up, please report what (exactly) they complain about.