EXC_BAD_INSTRUCTION DispatchQueue

[JohnDevC]

If I want to create an NSManagedObject in a background thread than EXC_BAD_INSTRUCTION (code=EXC_i386_INVOP, subcode=0x0) arise.

@discardableResult class func create(in context: NSManagedObjectContext = AERecord.Context.default) -> Self {
let entityDescription = NSEntityDescription.entity(forEntityName: entityName, in: context)!
let object = self.init(entity: entityDescription, insertInto: context) // error line Line 104 in Query.swift
return object
}

Part of my code:
DispatchQueue.global(qos: .background).async{
let model = Model.create()
}

Do you know what's going wrong?
Thank you for your efforts