'In yarn.lock, what is the meaning of separating package names with a comma?

Check out this yarn.lock file example:

# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
# yarn lockfile v1
package-1@^1.0.0:
  version "1.0.3"
  resolved "https://registry.npmjs.org/package-1/-/package-1-1.0.3.tgz#a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0"
package-2@^2.0.0:
  version "2.0.1"
  resolved "https://registry.npmjs.org/package-2/-/package-2-2.0.1.tgz#a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0"
  dependencies:
    package-4 "^4.0.0"
package-3@^3.0.0:
  version "3.1.9"
  resolved "https://registry.npmjs.org/package-3/-/package-3-3.1.9.tgz#a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0"
  dependencies:
    package-4 "^4.5.0"
package-4@^4.0.0, package-4@^4.5.0:
  version "4.6.3"
  resolved "https://registry.npmjs.org/package-4/-/package-4-2.6.3.tgz#a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0"

I'm having a hard time understanding what the package-4@^4.0.0, package-4@^4.5.0: part means. At first, I thought the comma acted as an OR condition, but in this case, just saying package-4@^4.0.0: would be enough. I searched all around, and I didn't find any detailed explanation about the yarn.lock file format.

node.jsyarnpkg


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