リレーションシップ '<var>Y</var>' の Role '<var>X</var>' の Multiplicity が無効です。依存ロールがキープロパティを参照しているため、依存ロールの複数要素の接続性の上限は 1 にする必要があります。

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Multiplicity is not valid in Role '<var>X</var>' in relationship '<var>Y</var>'. Because the Dependent Role refers to the key properties, the upper bound of the multiplicity of the Dependent Role must be 1.

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