Someone fills out a form, it makes a new record. Can it update existing?

[J715]

I have a table that is basically a homework submission table. I made a form for it.

Say a record lists the assignment (Homework #1) and I have 3 records for this. One each for Peter, Paul, and Mary.

My idea was that they would submit the form, pick Homework #1 and their name from the dropdown, and that when they finished submitting it, that record would go into the record that was waiting. Instead, it maks a new record.

How could I have that information go into the existing record?

[Zack_S]

Checkout this link How to Update Records from a Form | Airtable Support

or youtube video by @Gareth_Pronovost