# Introduction
Migrating `pageLayoutTab` to the v2 engine
- Types and constants
- Builder and validate
- Runner
Introduced a new `StrictSyncableEntity` that enforces that
`universalIdentifier` and `applicationId` are defined
As these entities are brand new we could enforce this rule already
This still requires a migration command to associate the existing
entities to custom workspace application instance and define
universalIdentifier
Handled retro-comp of the migration through a migration as upgrade
command fallback
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Co-authored-by: bosiraphael <raphael.bosi@gmail.com>
Paul Rastoin