Message in Chinese (Traditional) (中文（繁體）)
索引鍵欄位 '<var>X</var>' 的值不能是 Null。在型別 '<var>Type Name</var>' 上定義的索引鍵欄位需要非 Null 的值。
Unlocalized message
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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