bad-txns-inputs-missingorspent when create a new block

[HarvestStars]

Hi, there is an error when my lavad created a new block after the deadline was up:

2019-10-12T10:20:39Z UpdateTip: new best=3edded72a0f0590e51322ef099f19841c6093dc2acb8155c48376910c07f64a8 height=16109 version=0x20000000 log2_work=64.148842 tx=40456 date='2019-10-12T10:07:33Z' progress=0.000088 cache=0.5MiB(3477txo)
2019-10-12T10:20:39Z UpdateTip: new best=ecd49f3656ae01b29b20c134cc33a46b519296d3a7f33c0574243bcdda3266f3 height=16110 version=0x20000000 log2_work=64.148852 tx=40459 date='2019-10-12T10:20:08Z' progress=0.000088 cache=0.5MiB(3530txo)
2019-10-12T10:20:41Z Update new deadline: 51690, now: 1570875641, target: 1570927298
2019-10-12T10:20:41Z Update new deadline: 18253, now: 1570875641, target: 1570893861
2019-10-12T10:20:41Z Update new deadline: 3342, now: 1570875641, target: 1570878950
2019-10-12T10:20:47Z Update new deadline: 813, now: 1570875647, target: 1570876421
2019-10-12T10:21:06Z Update new deadline: 256, now: 1570875666, target: 1570875864
2019-10-12T10:24:24Z CPOCBlockAssember CreateNewBlock, plotid: 8343434995659376128 nonce:7249906519332005814 newheight:16111 deadline:32905846 utc:1570875864
2019-10-12T10:24:24Z CreateNewBlock(): block weight: 53858 txs: 31 fees: 51048 sigops 534
2019-10-12T10:24:24Z ERROR: ConnectBlock: Consensus::CheckTxInputs: 1ac00961624fe7b785cd5c2e78a30e49ccc9a85d553e11382a1ce99f70b86a7c, bad-txns-inputs-missingorspent, CheckTxInputs: inputs missing/spent (code 16)
2019-10-12T10:24:24Z 

************************
EXCEPTION: St13runtime_error       
CreateNewBlock: TestBlockValidity failed: bad-txns-inputs-missingorspent, CheckTxInputs: inputs missing/spent (code 16)       
Lava in scheduler       

2019-10-12T10:25:01Z 

Environment:
My system is ubuntu 16.04 64, and my lavad version is v0.3.1.

details:
when my deadline is over, the node mined a new block, then the error came up. the tx 1ac00961624fe7b785cd5c2e78a30e49ccc9a85d553e11382a1ce99f70b86a7c is a firestone release tx. and here is the code about this error:

bool Consensus::CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoinsViewCache& inputs, int nSpendHeight, CAmount& txfee)
{
    // are the actual inputs available?
    if (!inputs.HaveInputs(tx)) {
        return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputs-missingorspent", false,
                         strprintf("%s: inputs missing/spent", __func__));
    }
  ......
}

That means the inputs had no this related tx, but why is that?
I found the tx's prevtx hash is 029bad8e44553c1c68c5187cd4df8fb23388bd16ce467976c101de12bbff3c38, the second output of which is used here by the error tx 1ac00961624fe7b785cd5c2e78a30e49ccc9a85d553e11382a1ce99f70b86a7c.
However, at that moment, this prev tx is seems not in the inputs cache.
Anyone can help?

Log file
error of tx bad.log

[Networktoken]

一样的！我也是，第一个区块无法生成！
POC2 Deadline inconformity 2510146028316ul