コード一次移行での外部キーエラー：列を削除できません

Question

Entity Frameworkに問題があり、移行（データベース更新）と外部キー注釈を実行しています。私が手 エラーメッセージは後に次のとおりです。[...] update-database –verbose

Applying automatic migration: 201604060846578_AutomaticMigration. 
IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_OutreachSet_TargetContact' AND object_id = object_id(N'[dbo].[DiagnosticsSets]', N'U')) 
    DROP INDEX [IX_OutreachSet_TargetContact] ON [dbo].[DiagnosticsSets] 
IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_OutreachSet_TargetContact' AND object_id = object_id(N'[dbo].[MotivationSets]', N'U')) 
    DROP INDEX [IX_OutreachSet_TargetContact] ON [dbo].[MotivationSets] 
DECLARE @var0 nvarchar(128) 
SELECT @var0 = name 
FROM sys.default_constraints 
WHERE parent_object_id = object_id(N'dbo.MotivationSets') 
AND col_name(parent_object_id, parent_column_id) = 'TargetContact'; 
IF @var0 IS NOT NULL 
    EXECUTE('ALTER TABLE [dbo].[MotivationSets] DROP CONSTRAINT [' + @var0 + ']') 
ALTER TABLE [dbo].[MotivationSets] DROP COLUMN [TargetContact] 

The object 'PK_dbo.MotivationSets' is dependent on column 'TargetContact'. 
ALTER TABLE DROP COLUMN TargetContact failed because one or more objects access this column. 

私はちょうど0したいのですが：0 ... 1の関係を。それでおしまい。

私はちょうどこの例ではEF Code-First One-to-one relationship: Multiplicity is not valid in Role * in relationship

public class OutreachSet 
    { 
     [Key] 
     [Display(Name = "Target Contact")] 
     public string TargetContact { get; set; } 


     [Display(Name = "Next Outreach Step")] 
     public string NextOutreachStep { get; set; } 

     public virtual MotivationSet MotivationSet { get; set; } 
} 

public class MotivationSet 
    { 
     [Key, ForeignKey("OutreachSet")] 
     public string TargetContact { get; set; } 

     public string PowerMastery { get; set; } 


     [Required] 
     public virtual OutreachSet OutreachSet { get; set; } 
    } 

Answer 1

のように私はそれを自分で解決だと思い、それを実行しようとしましたと思います。 私はこれをしなかった：How to re-create database for Entity Framework?

この起こったが、私は

ありがとう幸せになるだろう、なぜ誰もが、まだ私に言うことができれば！