未指定 AssociationSet '<var>Y</var>' 中 End '<var>X</var>' 的 EntitySet，而且無法推斷，因為 EntitySet 模稜兩可。可能使用了一個以上 EntitySet; 必須指定具有 EntitySet 屬性的明確 End 項目。

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Unlocalized message

The EntitySet for the End '<var>X</var>' in AssociationSet '<var>Y</var>'was not specified, and cannot be inferred because the EntitySet is ambiguous. More than one EntitySet could be used; an explicit End element with an EntitySet attribute must be specified.

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