multiple-value .Exec() in single-value context with Golang sql

I am trying to update multiple values in a single row in an SQLite3 database using golang and the standard sql driver but am having trouble debugging the following error:

 command-line-arguments
./server.go:169: multiple-value updateStatement.Exec() in single-value context

The relevant code is as follows (irrelevant code has been omitted):

SQL Statement:

const (
    rsvpSubmit = "UPDATE rsvp SET Name = ?, Rsvp = ?, Guests = ?, Meal0 = ?, Meal1 = ?, Comments = ?, ModifiedAt = ? WHERE email = ?"
)

var (
    updateStatement *sql.Stmt
)

errr := updateStatement.Exec(
	r.FormValue("name"),
	r.FormValue("rsvp"),
	r.FormValue("guests"),
	r.FormValue("meal0"),
	r.FormValue("meal1"),
	r.FormValue("comments"),
	time.Now(),
	cookie.Value)

The database has the following columns (which the struct replicates):

	type User struct {
		Id         int
		Email      string
		Name       sql.NullString
		Rsvp       sql.NullInt64
		Guests     sql.NullInt64
		Meal0      sql.NullString
		Meal1      sql.NullString
		Comments   sql.NullString
		ModifiedAt sql.NullString
	}

Any help is greatly appreciated!

Stmt.Exec is defined as:

func (s *Stmt) Exec(args ...interface{}) (Result, error)

if you don't care about the result then you can use _, err := updateStatement.Exec(...)