To set the current date value in the date field of transaction , refer the below sample code
let currentRec = record.load({
type: record.Type.SALES_ORDER,
id: currentSO.id,
isDynamic: true,
});
let currentDate=new Date();
let newShipDate = generateDateString(date);
let formatedShipDate = format.parse({value: newShipDate ,type: format.Type.DATE});
currentRec.setValue({
fieldId: 'shipdate',
value: formatedShipDate
});
let recordId = currentRec.save({
enableSourcing: true,
ignoreMandatoryFields: true
});