Can I initialize a Codable Model from a different model in a Swift extension?

Question

I have a codable model

public final class MyCodableModel: Codable {
  public let id: Int
}

I also have another model that happens to have the same variables inside it.

public final class MyOtherModel {
  public let id: Int
}

Now, I want to instantiate MyCodableModel using MyOtherModel in an extension. I don't want to modify MyCodableModel directly because of dependency issues.

I first tried to use a normal initializer in my extension, but it said I needed to use a convenience initializer, so then I ended up with this:

extension MyCodableModel {
  convenience init?(myOtherModel: MyOtherModel) {
    id = myOtherModel.id
  }
}

But the error says 'let' property 'id' may not be initialized directly; use "self.init(...)" or "self = ..." instead. I assume this is because I'm not using the designated initializer of init(from: Decoder).

Is there another way to do this? Or will I not be able to convert MyOtherModel to a MyCodableModel?