c# - 冲突的外键sql

Question

INSERT 语句与 FOREIGN KEY 约束“FK_dbo.UserProfile_dbo.UserWork_UserWorkId”冲突。冲突发生在数据库“aspnet-UserAndWork-20130222085848”、表“dbo.UserWork”、列“UserWorkId”中。该语句已终止。

我在加载页面时遇到错误消息这是我的两个表类

public class UserProfile
{
    [Key]
    public int UserId{get;set;}
    public string Username{get;set;}
    public int UserWorkId{get;set;}
    [foreignkey("UserWorkId")]
    public virtual UserWork UserWorkLog{get;set;}
}

public class UserWork
{
    [Key]
    public int UserWorkId{get;set;}
    public int UserId;
    //somemoire
}