I have a model called jurisdictions that houses political jurisdictions. Now theres jurisdictions can sit within other jurisdictions, so I have an optional parent jurisdiction...

Now I can create new jurisdictions just fine, but if I attempt to use a put request to update a jurisdictions parent, I get the following error:

FluentKit/OptionalParent.swift:20: Fatal error: OptionalParent relation OptionalParent<Jurisdiction, Jurisdiction>(key: parent_jurisdiction_id) is get-only.
2022-05-18 13:39:12.421882-0700 Run[32583:5555712] FluentKit/OptionalParent.swift:20: Fatal error: OptionalParent relation OptionalParent<Jurisdiction, Jurisdiction>(key: parent_jurisdiction_id) is get-only.```

Jurisdictions Model

import Fluent
import Vapor

final class Jurisdiction: Model, Content {
    static let schema = "jurisdictions"
    
    @ID(key: .id)
    var id: UUID?

    @OptionalParent(key: "parent_jurisdiction_id")
    var jurisdiction: Jurisdiction?
    
    @Field(key: "name")
    var name: String
    
    @Field(key: "scope")
    var scope: String
    
    @Children(for: \.$jurisdiction)
    var jurisdictions: [Jurisdiction]
    
    
    init() { }

    init(name:String, scope:String,parentJurisdictionID:UUID? = nil) {
        self.name = name
        self.scope = scope
        self.$jurisdiction.id = parentJurisdictionID
    }
}

Jurisdiction Migration

import Foundation
import Vapor
import Fluent
import FluentPostgresDriver

struct CreateJurisdiction: Migration {
    
    func prepare(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions")
            .id()
            //parent fields
        
            //attribute fields
            .field("name", .string, .required)
            .field("scope",.string, .required)
            
            //make unique on:
            .unique(on: "name", "scope")
            
            //create scheme
            .create()
    }

    func revert(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions").delete()
    }
}

struct AddParentJurisdictionToJurisdictions: Migration {
    func prepare(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions")
            .field("parent_jurisdiction_id", .uuid, .references("jurisdictions", "id"))
            .update()
    }
    func revert(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions")
            .deleteField("parent_jurisdiction_id")
            .delete()
    }
}

Jurisdiction Controller

import Foundation
import Vapor
import Fluent
import FluentPostgresDriver

struct JurisdictionsController: RouteCollection {
    func boot(routes: RoutesBuilder) throws {
        
        let jurisdictions = routes.grouped("jurisdictions")
        jurisdictions.put(use: update)

           }
        
        }
    //
    
    func update(req:Request) throws -> EventLoopFuture<HTTPStatus> {
        
        let jurisdiction = try req.content.decode(Jurisdiction.self)
        
        return  Jurisdiction.find(jurisdiction.id,on: req.db)
            .unwrap(or:Abort(.notFound))
            .flatMap {
                $0.name = jurisdiction.name
                $0.scope = jurisdiction.scope
                $0.jurisdiction = $0.jurisdiction //if I remove this line it works
                return $0.update(on: req.db).transform(to: .ok)
            }

    }
    
    

}

using a put http request looking like this: http://localhost:8080/jurisdictions with the following content produces the error...don't know what to do here.

{
    "scope": "locasl",
    "id": "0C6D5F6E-0244-4ABE-847F-2AF89CA27C30",
    "jurisdiction": {
        "id": "128133B0-25FE-4B6C-B211-CE01AA236AF9"
    },
    "name": "local"
}