bts, err = z.DeleteMarker.UnmarshalMsg(bts)
				if err != nil {
					err = msgp.WrapError(err, "DeleteMarker")
					return
				}
			}
		case "v":
			z.WrittenByVersion, bts, err = msgp.ReadUint64Bytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "WrittenByVersion")
				return
			}
		default:
			bts, err = msgp.Skip(bts)
			if err != nil {
				err = msgp.WrapError(err)