Self-relation column order?

[terion-name]

I am currently migratiing from prisma1 to prisma2 and there is question in scope of data migrating.

If we have a self-relation (a parent-children tree for example or a many-to-many graph), I can't determine what side what in relation table will be? I can obviously check it for certain cases by data, but I need a rule to make a migration script for multiple projects.

E.g.

type Unit {
    id: ID! @id
    managedBy: Unit @relation(name: "Manage" link: TABLE)
    manages: [Unit!]! @relation(name: "Manage")
}

In this case managedBy is in A column and manages in B, but why? Because of parent-child relation? If yes then what it would by in M2M? Or because of field names and alphabetical ordering?

[stale]

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