EF ignores DatabaseGeneratedOption.None

I am using EF 6.1.3 Code First but no migration as the database already exists. I have an object SRReports

with the following property:

[Key, Required]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.None)]
public int FRID { get; set; }

      

        
        
        
      

    

Entity Framework ignores DatabaseGeneratedOption.None

and sends TSQL to server assuming FRID is autogenerated. The object is assigned a value for FRID, but the frame structure ignores it and assumes that it is auto-generated. (this is confirmed by a TRACE check of what is sent to the server). Exception message:

Message = Unable to insert NULL value in column "FRID", table "RevLogon.dbo.SCIREPORTS"; the column does not allow zeros. INSERT fails. The application has been completed.

I tried to use fluent API instead of (and in addition to) annotations.

 modelBuilder.Entity<SCIREPORTS>()
            .HasKey(e => e.FRID);
 modelBuilder.Entity<SCIREPORTS>()
            .Property(e =>  e.FRID).HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);

      

        
        
        
      

    

But then I get an error when I query the table:

SCIREPORTS sr = mydb.SCIREPORTS.Where(s => s.FRID == FRID     ).FirstOrDefault();     

      

        
        
        
      

    

I am getting the following error:

Fixed System.MissingMethodException HResult = -2146233069 Message = Method not found: 'System.Data.Entity.ModelConfiguration.Configuration.PrimitivePropertyConfiguration System.Data.Entity.ModelConfiguration.Configuration.PrimitivePropertyConfiguration.HasDatabaseGeneratedOption (System.Data.Entity.ModelConfiguration.Configuration.PrimitivePropertyConfiguration. *

I uninstalled and reinstalled my EF package but was unable to resolve the issue. How can I force EF to insert a record with an ID?

Here's the basic code that inserts the record:

public SRUserComp(string myemail, short mycounter, int myFRID, string myreptype, string mypassword)
    {   email = myemail;
        Counter = mycounter;
        reptype = myreptype;
        password = mypassword;
        FRID = myFRID;        }

public bool CreateSRRecord(DateTime repduedate,
        short repnumber)
{BSRModel mydb = new BSRModel(); 
sr = new SCIREPORTS();
sr.FRID = FRID;
sr.Counter = Counter;
sr.Final = true;
sr.RepDueDate = repduedate;
mydb.SCIREPORTS.Add(sr);
 mydb.SaveChanges();
return true; }   

      

        
        
        
      

    

After the saveChanges statement, I get the following instructions from the sql profiler on the server:

    INSERT [dbo].[SCIREPORTS]([Counter], [RepDueDate], [RepArrivalDate],
    [SciAppDate], [Adminappdate], [legacyDate], [RepNumber], [Final], 
    [RepReminderID], [Notes], [HaimSaw], [ResAuthApprovDate])

    VALUES (@0, @1, NULL, NULL, NULL, NULL, @2, @3, NULL, NULL, NULL, NULL)

    SELECT [FRID]
    FROM [dbo].[SCIREPORTS]
    WHERE @@ROWCOUNT > 0 AND [FRID] = scope_identity()