Returning to the previous step of ReplyFlow

[RDaneliya]

I have pretty stupid issue: I can't find proper way how to return to previous step. For instance user entered incorrect value then bot should relply smth like "Your input is not correct, blah, blah etc.". And then return to previous step waiting for new input. I found pretty simple way but it seems not really right for me

`

    ReplyFlow correctCommodityFlow = null;
    ReplyFlow incorrectCommodityFlow = null;

    ReplyFlow startFlow = ReplyFlow.builder(db)
        .action((baseAbilityBot, update) -> silent.send(
            "Please enter something",
            update.getMessage().getChatId()))
        .next(correctCommodityFlow)
        .next(incorrectCommodityFlow)
        .build();

    correctCommodityFlow = ReplyFlow.builder(db)
        .action((baseAbilityBot, update) -> {
            silent.send("Nice input, awesome chars", update.getMessage().getChatId());
        })
        .onlyIf(update -> isValid(update.getMessage().getText()))
        .build();

    incorrectCommodityFlow = ReplyFlow.builder(db)
        .action((baseAbilityBot, update) ->
            silent.send("Not really nice input", update.getMessage().getChatId()))
        .next(startFlow)
        .build();

    return startFlow;

`

So I declare variables with null value put them into .next() method and then initialize. But that's kinda ugly way for me. Is there some other way I can achieve flow cycle?
Thanks in advance