Message in Chinese (Traditional) (中文（繁體）)
作業失敗: 由於一個或多個外部索引鍵屬性不可為 Null，因此無法變更關聯性。關聯性變更時，相關的外部索引鍵屬性會設為 Null 值。如果外部索引鍵不支援 Null 值，則必須定義新的關聯性、必須為外部索引鍵屬性指派另一個非 Null 的值，或者必須刪除無關的物件。
Unlocalized message
The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted.
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