Change to SwiftData ModelContainer causing crashes

I have some models in my app:

[SDPlanBrief.self, SDAirport.self, SDChart.self, SDIndividualRunwayAirport.self, SDLocationBrief.self]

SDLocationBrief has a @Relationship with SDChart

When I went live with my app I didn't have a versioned schema, but quickly had to change that as I needed to add items to my SDPlanBrief Model.

The first versioned schema I made included only the model that I had made a change to.

static var models: [any PersistentModel.Type] {
        [SDPlanBrief.self]
    }

I had made zero changes to my model container and the whole time, and it was working fine. The migration worked well and this is what I was using:

.modelContainer(for: [SDAirport.self, SDIndividualRunwayAirport.self, SDLocationBrief.self, SDChart.self, SDPlanBrief.self])

I then saw that to do this all properly, I should actually include ALL of my @Models in the versioned schema:

enum AllSwiftDataSchemaV3: VersionedSchema {
    
    static var models: [any PersistentModel.Type] {
        [SDPlanBrief.self, SDAirport.self, SDChart.self, SDIndividualRunwayAirport.self, SDLocationBrief.self]
    }

    static var versionIdentifier: Schema.Version = .init(2, 0, 0)
}

extension AllSwiftDataSchemaV3 {
    
    @Model
    class SDPlanBrief {
        var destination: String
        etc...
        
        init(destination: String, etc...) {
            self.destination = destination
            etc...
        }
    }
    
    @Model
    class SDAirport {
        var catABMinima: String
        etc...
        
        init(catABMinima: String etc...) {
            self.catABMinima = catABMinima
            etc...
        }
    }
    
    @Model
    class SDChart: Identifiable {
        var key: String
        etc...
        var brief: SDLocationBrief?  // @Relationship with SDChart
        
        init(key: String etc...) {
            self.key = key
            etc...
        }
    }
    
    @Model
    class SDIndividualRunwayAirport {
        var icaoCode: String
        etc...
        
        init(icaoCode: String etc...) {
            self.icaoCode = icaoCode
            etc...
        }
    }
    
    @Model
    class SDLocationBrief: Identifiable {
        var briefString: String
        etc...

        @Relationship(deleteRule: .cascade, inverse: \SDChart.brief) var chartsArray = [SDChart]()

        init(
            briefString: String,
            etc...
            chartsArray: [SDChart] = []
        ) {
            self.briefString = briefString
            etc...
            self.chartsArray = chartsArray
        }
    }
}

This is ALL my models in here btw.

I saw also that modelContainer needed updating to work better for versioned schemas. I changed my modelContainer to look like this:

actor ModelContainerActor {
    
    @MainActor
    static func container() -> ModelContainer {
        let schema = Schema(
            versionedSchema: AllSwiftDataSchemaV3.self
        )
        let configuration = ModelConfiguration()
        let container = try! ModelContainer(
            for: schema,
            migrationPlan: PlanBriefMigrationPlan.self,
            configurations: configuration
        )
        return container
    }
}

and I am passing in like so:

.modelContainer(ModelContainerActor.container())

Each time I run the app now, I suddenly get this message a few times in a row:

CoreData: error: Attempting to retrieve an NSManagedObjectModel version checksum while the model is still editable. This may result in an unstable verison checksum. Add model to NSPersistentStoreCoordinator and try again.

I typealias all of these models too for the most recent V3 version eg:

typealias SDPlanBrief = AllSwiftDataSchemaV3.SDPlanBrief

Can someone see if I am doing something wrong here? It seems my TestFlight users are experiencing a crash every now and then when certain views load (I assume when accessing @Query objects). Seems its more so when a view loads quickly, like when removing a subscription view where the data may not have had time to load??? Can someone please have a look and help me out.