You should not write a CRUD app in 2018. Update and delete are remnants from the times where memory and disk were expensive, and update in place was a necessity. This is no longer the case. Apart from a few very specialised use cases, there is no need any more for update or delete. Record new facts and don’t destroy the older ones.
This is not true generally anyway (in most mainstream systems it is much simpler to update or delete when appropriate), but please consider e.g. the GDPR where the ability to delete personal data is mandatory, and the "keep everything forever" mindset is precisely what that legislation is designed to remedy.
