Cannot set dynamic data link duplicate check

hello there, i am trying to build a form. In this form i need to check the duplicate of the participant id which will be built on other form value. but getting error while doing it.

please check the image of the error.

I cannot upload attachment as it shows that new users cannot upload any attachment

Welcome to the community, @mahbuba_pksf! Are you trying to link the form to itself to avoid duplicate IDs?

Yes. I am trying to avoid duplicate id in the same form

Hello there. I am still waiting to hear from you in this matter.