Is this a common error when updating Solidus?

You have already activated stringio 3.0.4, but your Gemfile requires stringio 3.0.5. Prepending 'bundle exec' to your command may solve this. (Gem::LoadError)

We have a couple Solidus sites on the same Hatchbox server, and sometimes doing a

bundle update

on one causes this error. Only way around it I have found so far is to go into the Ruby version the site is running on, and do a

gem install stringio -v 3.0.5

which fixes it for that site. Yesterday I did this, and it fixed the site I was working on, but broke another Solidus site running on that server until I did a

bundle update

on that one as well. Looks like

stringio

is required by

psych

which is required by

solidus_core

. Is there any way to prevent this from happening?

Not sure if it solves, but

gem install

has a

--default

option that might come in handy