RubyGem Version Error: Rack (1.0.0 not ~> 1.0.1)

Question

I was working on a rails project on my laptop and pushing the code on github. Now I cloned the project on my desktop.

at startup:

rake db:migrate

I get the following error:

rake aborted!
RubyGem version error: rack(1.0.0 not ~> 1.0.1)

(See full trace by running task with --trace)

Before this error, I had to run the following commands:

sudo gem install -v=2.3.5 rails
sudo gem update rack

Answer 1

sudo gem install -v 1.0.1 rack