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

Had the same issue and was able to solve with some hints from above answers:

• In package manager console check the default project (point to the project with the migration configuration
• Ensure the startup-proj has a web.config with a valid connectionstring ( or
• Ensure the project with migrations has an app.config / web.config with a valid connectionstring
• Check permissions in DB (for the user configured in you connectionstring)

Use "update-database -verbose" in the package manager console to get more specific information where migrations tries to connect to. (Helped in my case to find out my startup proj was not set correctly...)

Answer 2

This isn't going to be the answer for many people, but EF will chuck this error when it can't connect to the DB. If you're working from home like I am, make sure you're still connected to your VPN!

Answer 3

That was happened when i suddenly renamed class of old migration that already exist in db. I checked VCS history, determined that and renamed back. All worked afterwards.

Answer 4

I did another way. I droped database entirely and run "update-database" again in vs.