Room annotation @Ignore, always throws an error?

Question

android studio

It is written, when adding this annotation to a field, room will not write this field to the table and read it. But I always get the error:
Entities and Pojos must have a usable public constructor. You can have an empty constructor or a constructor whose parameters match the fields (by name and type).
I also tried to create another constructor, specifying the same fields, but only the field marked with @Ignore I set the default value, it was still written to the database.