I have a SharePoint list, Travel_test, and in that list i have a 'Person' column.
I have been successful with a combobox on my PowerApp to pull in the 365-profile with the following:
DisplayFields = ["DisplayName"]
Items = Choices([@Travel_Test].Traveler)
But when trying to patch the record, I am receiving the following error:
Patch Code:
Patch(Travel_Test, Defaults(Travel_Test), {Traveler:ComboBox1.Selected.DisplayName})
Error:

Not sure what I am doing wrong.