Validation Error: Value is not valid

Question

I have a problem with a p:selectOneMenu, no matter what I do I cannot get JSF to call the setter on the JPA entity. JSF validation fails with this message:

Answer 1

In my case I forgot to implement a correct get/set methods. It happened because I have changed a lot of attributes along the development.

Without a proper get method, JSF can´t recover your selected item, and happens what BalusC said at item 1 of his answer:

1 . The selected item is missing in the list of available items. This can happen if the list of available items is served by a request scoped bean which is not properly reinitialized on subsequent request, or is incorrectly doing the business job inside a getter method which causes it to return a different list in some way.