Hello Everyone,
In Dataverse, I have created a table with column type text. I used these columns in power app, I changed the column type to combo box in forms. My motto is to submit the form and retrive using gallery. Then modify required fields and replace modified data back to same row.
But when I do not modify the data of these columns, I see error message card pop out. I want that message only when no data is present in that particular field. 
I do not understand why it is showing error message, even it contains text.