while assigning values to a data driven dropdown inside a inner repeat (repeat under repeat) is showing 'undefined' multiple times.

i have variable(say users) which holds [{"value":"xxxx STANLEY","label":"xxxx STANLEY"},{"value":"Alternate","label":"Capture Alternate Address"}]
and i am assigning values in side look to dd dropdown as below. other text fields show values properly but dd driven dropdown. Please suggest any solution.
Form.data.outrepeat[oIndex].inrepeat[inIndex].usersdf = users;

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