Filter value in a Dropdown in a gallery once it has been selected in any dropdown

[ThD7]

I have a gallery which contains dropdown (one in each row)

I want my dropdowns to show only non selected items from my table, based on others dropdown choices.
I tried filtering dropdowns items based on dropdown.selected value but powerapps tells me loops are prohibited.

Any suggestion?

[v-jefferni · Accepted solution]

Hi @ThD7 ,

As the error message told you, using dropdown selected values to filter the Gallery cannot be done because of circular references.

Please try and use a Dropdown/Combo box outside the Gallery, set to allow multiple selections, then use the selected values to filter the Gallery.

Best regards,