Strange bindings error

  • Hi! I’m experiencing a strange core data and bindings error:

    "An -observeValueForKeyPath:ofObject:change:context: message was
    received but not handled."

    My array controller contains objects of entity Salary each having a
    relationship to a Person object.

    The errors apparently depends on a bound sort descriptors array.
    This array of keypaths just works:
    - @"person.department.tag", @"person.lastName", @"person.firstName"

    But the reverse one causes the error:
    - @"person.lastName",@"person.firstName",@"person.department.tag"

    If I just do - @"person.lastName",@"person.firstName" then no error
    appears.

    Why wouldn’t it work with the department tag as the primary key?

    Thanks for any help!
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