policy.membership_duplicate: Entity declares a membership twice, or gives one of its parts twice

Entity declares a membership twice, or gives one of its parts twice.

Area 9, Policy; not declinable; the next step is usually the agent's.

An entity stores one role, held by one member in one place:

example

type Handle = Text {    max_length: 40}entity User {    id: Uuid    handle: Handle {        unique: true    }}principal {    user: {        subject: User.handle    }}type StaffRole = Enum {    steward}entity StaffMembership {    id: Uuid    user_id: User.id {        on_delete: OnDelete.cascade    }    role: StaffRole    membership: {        scope: MembershipScope.application        member: user_id        role: role    }    membership: {        scope: MembershipScope.application        member: user_id        role: role    }}

jadpo checkcheck failed: 1 error, 1 file

error StaffMembership declares membership: twice

--> main.jadpo:35:5

   |29 |     membership: {   |     ---------- first declared here35 |     membership: {   |     ^^^^^^^^^^ declared again

reason: A membership entity stores one role, held in one place by one member, so it says so once.
next: Remove one membership:, or keep the second role in an entity of its own (agent)
rule: policy.membership_duplicate
help: https://jadpo.dev/docs/errors/policy.membership_duplicate