Ключевое поле "<var>X</var>" не может иметь значение NULL. Значение, отличное от NULL, необходимо для ключевых полей, определенных в типе "<var>Type Name</var>".

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The key field '<var>X</var>' cannot have a value of null. A non-null value is required for the key fields defined on type '<var>Type Name</var>'.

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