updating some not required fields triggers validator

I have a problem when I update a set of records

so for example if I have a student and this student has a list of books.

if I call
```
let books = await Books.where({student_id: id}).save({active: false}, {
method: 'update',
patch: true
});
```
although I am only changing the active, bookshelf validator throughs name is required (where the name is a required field in books table)

Any idea?

No files, tests, or entry points are named. Start by reproducing the provided Bookshelf.js update example and tracing how bookshelf-validate handles partial updates; done means changing only active succeeds without requiring the unchanged name field, with regression coverage for this case.

Written by the indexing model from the issue text.