I have an expanded form type. If I load the page, then someone deletes one of the entities that is in my available choices and I select/submit it I get an error. This behaviour is correct.

However, all the valid options I have chosen have no been unselected and the data reverts to the original value. Is there a way to stop this and use the values that were selected regardless of whether it is valid/invalid. Or potentially even just ignore invalid values?