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

Question

I have the below error when I execute the following script. What is the error about, and how it can be resolved?

Insert table(OperationID,OpDescription,Filte         


        

Answer 1

In my case I was having set another property as key in context for my modelBuilder.

modelBuilder.Entity().HasKey(t => t.OtherProp);

I had to set the proper id

 modelBuilder.Entity().HasKey(t => t.Id);