Entity Framework error: Cannot insert explicit value for identity column in table

Question

I\'m getting this error on EF.

Cannot insert explicit value for identity column in table \'GroupMembers_New\' when IDENTITY_INSERT is set to OFF.

Answer 1

First match in google, so here is my solution:

EF Code first: Because of an auto-increment PK 'id' field AND a guid column, design like this:

[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid FileToken { get; set; }

there was a duplicate identity. I changed it to:

[DatabaseGenerated(DatabaseGeneratedOption.Computed)]
[DefaultValue("newid()")]
public Guid FileToken { get; set; }

and the problem went away.

Hope it helps you.

Erik