if err != nil {
		err = msgp.WrapError(err, "ReplicationState")
		return
	}
	if msgp.IsNil(bts) {
		bts = bts[1:]
		z.Data = nil
	} else {
		z.Data, bts, err = msgp.ReadBytesBytes(bts, z.Data)
		if err != nil {
			err = msgp.WrapError(err, "Data")
			return
		}
		if z.Data == nil {
			z.Data = make([]byte, 0)
		}
	}
	z.NumVersions, bts, err = msgp.ReadIntBytes(bts)