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The root issue I'm having is this error: You must use Bundler 2 or greater with this lockfile.

I get the error even if I just use the rails command with no arguments.

When I run gem list bundler I see: bundler (2.0.2, default: 1.17.2)

How can I remove the old version of bundler, or set the new version as the default?

Thanks.

Blaine Lafreniere
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  • related https://stackoverflow.com/questions/54761120/how-to-change-bundler-default-version – Tun Dec 06 '19 at 03:47

2 Answers2

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did you try?

gem uninstall bundler --version 1.17.2

or 

gem install --default -v2.0.2 bundler
Fab V.
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I fixed it by running gem update --system

I don't know how that fixed anything or why... because gem list bundler still says bundler (2.0.2, default: 1.17.3)

Blaine Lafreniere
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