Entity Framework 5 expects CreatedOn column from MigrationHistory table

Question

I am migrating an MVC 3 application from EF 4.3 to EF 5. I noticed that EF 5 expects a CreatedOn column in the __MigrationHistory table, which does

Answer 1

The CreatedOn column is no longer required. We attempt to query from it in order to determine whether we need to drop it. i.e. You are upgrading from 4.3 to 5.