Why would any tool reject a version that ostensibly follows semantic versioning? The answer lies in . Imagine Package A requires some-lib@^1.20.0 , while Package B requires some-lib@~1.21.0 . If Meteor attempts to resolve a lockfile, it might find that 1.21.1 satisfies B but breaks A due to a removed function. Meteor, acting as the arbiter, "rejects" the version to prevent a runtime catastrophe.

Replace 2.0 with the version you're aiming to use or the latest stable version available.

meteor update --release 1.12.1 # Example version, replace with needed one