TaggedClass Not Accepting Custom Annotations

class MyName extends Schema.TaggedClass<MyName>("@app/MyName")("MyName", {
      name: Schema.String,
    }, {
      [MyAnnotation]: "set",
    } ) {}

class MyName extends Schema.TaggedClass<MyName>("@app/MyName")("MyName", {
      name: Schema.String,
    }, {
      [MyAnnotation]: "set",
    } ) {}