The cross-version compatibility checking mechanism is triggered when a project with new feature usages is loaded with an older version of the modeling tool. The mechanism tracks feature usages of the 2021x Refresh 1 version, which results in the appearance of a Missing features detected notification in earlier modeling tool versions. The following table shows tracked features and the version they appear in. Projects can be committed/saved without any consequences. Feature name Version Contextual Relationships in Derived Properties 2021x Refresh 1 Contextual Relationships in Generic Tables 2021x Refresh 1 Frozen Smart Packages 2021x Refresh 1