Skipped Changes to Review related list

To prevent your customizations from being overwritten during system upgrades, the upgrade process skips (does not apply the update to) objects that have been customized. To assist you in tracking and resolving skipped update records that need review, Skipped Changes to Review lists all updates skipped during the upgrade process.

By default, the list is filtered by disposition skipped error or (disposition skipped manual merge and changed is true) or (disposition skipped and changed is true) or (disposition skipped(second pass) and changed is true), and the resolution status is either empty or not reviewed.

Navigate to System Diagnostics > Upgrade History to view the Skipped Changes to Review related list.