Conda packages contain a metadata file (index.json) which provides information about the package and the software contained within. The metadata for all packages within a channel are combined into a single json file (repodata.json) which is used by conda for package discovery and to resolve and verify dependencies when a package is installed or removed from an environment.
Unfortunately, the metadata contained within a package may be incorrect, either because of a mistake made when the package was created or because new information makes the original metadata incomplete.