Hi all,
I am a beginner in power apps. I want to use a combo box(Not mandatory field) to create selective filter or formatting. But I am able to submit the form if I don't use the data from the combo box . But if I use the data from the combo box, I am not able to submit the form.

In the above picture, I have GEO as combo box. It's value is based on Sub GEO (DataCardValue17). If I fill the form without GEO(which is the Combo box), I am able to submit the form. But if I fill the form with value in GEO, I am unable to submit the form and the error says:

Please help me with this.