Updating the version of Dash crashes my app

I have updated dash to the latest version. Doing this, the application I was developing has started to crash, when before updating it was going well. The basic error it is giving is this one:

A nonexistent object was used in an State of a Dash callback. The id of this object is A and the property is B. The string ids in the current layout are: […]

Why is this happening now, when before the last update it was going well. I need help!