So on my edit button this is what is currently has on the page when someone click on an edit button.

UpdateContext({ selectedRecord: RecordsGallery1.Selected, editMode: true })
This allows users to edit the page and have the data stored. However when it comes to the Date as I have tried to change
UpdateContext({ selectedRecord: 'Tour Start Date_DataCard1'.SelectedDate, editMode: true })
I get this error

I've tried UpdateContext({ selectedRecord: DatacardValue.SelectedDate, editMode: true }) and it still gives me errors
what data do I need to link or add to the code to have no errors and still have an editable page.