The MERGE statement attempted to UPDATE or DELETE the same row more than once.

[attrib75]

I'm getting this when I call
numToLookup.Apply(context);
in my seed method

[timabell]

I have no idea how that could happen. Could you supply some steps to reproduce the problem please. Preferably in the form of an additional unit test for the project. Thanks.

[attrib75]

It happens during an EF update-database. In the seed method I'm calling
var enumToLookup = new EnumToLookup();
enumToLookup.Apply(context);

[timabell]

Nothing wrong with what you've said there, must be something in your specific dbcontext or database, I'd be interest to know what.