I found this on line #254 of my update page and adjusted it.
// The initial value to be displayed in the editor.
$CKEditor_initialValue = "".((isset($_GET["invalid"])?ValidatedField("eventsbrannualupdate","late_fees_entry_deadline",false):"".$WADAevents_br_annual_update->getColumnVal("late_fees_entry_deadline")."")) ."";