# Gaps Between First-Generation and Second-Generation Managed Packaging

The following functionality is supported in first-generation managed packaging, and not yet supported in second-generation managed packaging. We’re working to address these feature gaps.

- Package versions can’t be deprecated.
- [Apex VersionProvider](https://help.salesforce.com/articleView?id=code_version_settings_apex.htm) isn’t supported.
- A default language for labels in packages can’t be specified.

See the [Metadata Coverage Report](https://developer.salesforce.com/docs/success/metadata-coverage-report/references/coverage-report/metadata-coverage-report.md), for the latest information on supported metadata types.