Fixing Unresolved or ambiguous specs warning message

Jan 22, 2025

In the last few days every time I ran a Ruby command or anything to do with Rails or RubyGems, I got this warning:

$ bin/rails c
WARN: Unresolved or ambiguous specs during Gem::Specification.reset:
      stringio (>= 0)
      Available/installed versions of this gem:
      - 3.1.2
      - 3.1.0
WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'
Please report a bug if this causes problems.

The command itself ran properly, but I was getting sick of seeing this noise. I tried running gem cleanup stringio and bundle cleanup stringio to no effect. I tried running bundle cleanup --force as suggested in https://stackoverflow.com/questions/17936340/unresolved-specs-during-gemspecification-reset

All to no avail, the pesky warning kept cropping up.

Then I found this GitHub issue comment which suggested upgrading the system RubyGems:

gem update --system

With this, RubyGems was updated to version 3.6.3 and the warning went away!