Error: The path `/home/user/projects/rails_engine/vendor/engines/blorgh` does not exist

I was learning how to create mountable engine from here
Getting Started with Engines — Ruby on Rails Guides ,
on this section
3.1 Generating a Post Resource

when i try to run rake db:migrate i got this error The path
/home/user/projects/rails_engine/vendor/engines/blorgh does not
exist.,

Please help me to address the issue.thanks in advance.