Не был задан набор EntitySet для элемента End "<var>X</var>" в наборе AssociationSet "<var>Y</var>", и его невозможно вывести, поскольку ни один из элементов EntitySet не относится к правильному типу.

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The EntitySet for the End '<var>X</var>' in AssociationSet '<var>Y</var>' was not specified, and cannot be inferred because none of the EntitySet elements are of the correct type.

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