Create recorrd with firestore, Problem with created date, name and update date

Hi, im trying to make a create record function for firestore and there are three fields that i dont know what i should put, and without them the function doesnt work.

at the the create time i have tried NOW() but it doesnt work, Also i cant understand what the name refers to.
And this is the error i get

Do you know what i should put in these fields?
thanks you in advance

Actually i solved it myself, for the times you have to use the NOW() function or a date from here 0001-01-01T00:00:00Z to here 9999-12-31T23:59:59.999999999Z and for the name i couldnt figure it out but i left it blank