# Sidekiq Gem::ConflictError

**URL:** <https://meta.discourse.org/t/sidekiq-gem-conflicterror/49076>\
**Category:** Product Support\
**Created:** [23 Agosto , 2016 16:25 UTC](https://meta.discourse.org/t/sidekiq-gem-conflicterror/49076 "2016-08-23T16:25:53Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![Overgrow](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/overgrow/32/478189_2.png) [@Overgrow](https://meta.discourse.org/u/Overgrow)\
**Post date:** [23 Agosto , 2016 16:25 UTC](https://meta.discourse.org/t/sidekiq-gem-conflicterror/49076/1 "2016-08-23T16:25:53Z")

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Hi, I’ve stumbled upon this issue, hard to tell what I’ve done wrong and changed in the process. My sidekiq was working well but suddenly I can’t start it…

> overgrow@axii:~/discourse$ sidekiq  
> /home/overgrow/.rbenv/versions/2.3.0/lib/ruby/site\_ruby/2.3.0/rubygems/specification.rb:2288:in `raise\_if\_conflicts’: Unable to activate actionpack-5.0.0, because rack-1.6.4 conflicts with rack (~\> 2.0) (Gem::ConflictError)  
> overgrow@axii:~/discourse$ gem list --local | grep rack  
> rack (2.0.1, 1.6.4)  
> overgrow@axii:~/discourse$ gem list --local | grep actionp  
> actionpack (5.0.0, 4.2.7)

I’ve already tried running `bundle install`

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_[View the full topic](https://meta.discourse.org/t/sidekiq-gem-conflicterror/49076)._