未指定 AssociationSet“<var>Y</var>”中 End“<var>X</var>”的 EntitySet，并且因为 EntitySet 不明确，无法推断该 EntitySet。可以使用多个 EntitySet；必须指定具有 EntitySet 特性的显式 End 元素。

Message in Chinese (Simplified) (中文(简体))

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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