Filtering 2 RepeatingGroups

Hi, i try to filter 1 repeating group based on second repeating group

Table1 : Questions [ questionID, questionTXT]
Table 2 : Answers [ref_questionID, answerTXT]

my first repeating group based on Questions
my second repeating group based on Answers

i want to filted the first RG (Questions) to omit Answered questions.

Thats useful if i want to not reply to the same Question many times

NB: we can had more than 500 Questions in Table.

Thanks for help
Pascal :skier:

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