Unable to generate an explicit migration in entity framework

Question

I am adding a new migration but this message shows:

Unable to generate an explicit migration because the following explicit migrations are pending:

Answer 1

Old post but might help someone. For me it happened because I renamed Assembly name and Default namespace of the project. So I had to update ContextKey in _MigrationHisotry table to the new value of Assembly name or Default namespace. Honestly I don't know which one should be used, because for me both are same!