Postgres migrations: Changing foreign key constraint does not trigger migration

When changing a foreign key constraint, e.g. from

PTH.share [PTH.mkPersist PTH.sqlSettings, PTH.mkEntityDefList "entities" ] [PTH.persistLowerCase|
  Parent sql=parent
    number Int
    year Int
   
    Primary number year
    deriving Show Read

  Child sql=child
    number Int
    year Int
    version Int

    Primary number year version
    Foreign Parent fk number year
    deriving Show Read
|]

to

PTH.share [PTH.mkPersist PTH.sqlSettings, PTH.mkEntityDefList "entities" ] [PTH.persistLowerCase|
  Parent sql=parent
    number Int
    year Int
   
    Primary number year
    deriving Show Read

  Child sql=child
    number Int
    year Int
    version Int

    Primary number year version
    Foreign Parent OnDeleteCascade fk number year
    deriving Show Read
|]

no migrations are triggered from

migrateAll :: Migration
migrateAll = migrateModels entities

Am I missing something here, in order to get the proper fkey update?

I am using the postgres backend.

Start by reproducing the change from the issue's Parent and Child definitions using the PostgreSQL backend and migrateAll = migrateModels entities. Trace how migrateModels compares foreign-key definitions, especially the added OnDeleteCascade option. Done means changing the constraint generates and applies the expected foreign-key migration.