bitcoin Transaction sign error :Invalid transaction. Error: bad-txns-inputs-missingorspent

[jiuyaopinyin]

this is my code ,when i Broadcast it ,show error :
Invalid transaction. Error: bad-txns-inputs-missingorspent
anyone know why? please?

the outputBtc.encoded.hexString is :
010000000001016d2e9737f97b8443d7a54ec49d00f2bc3ac9be715b11727a293e8f04d41352120000000000ffffffff025802000000000000160014ffc354f08efa5f8a4a33c74c594244b17091d82cea270000000000001600140c03e507f38033aca9ac5c32b32dce56051d097b02483045022100e530e44bc852906a6314944ba1f12d6f7a1c65eceda622d01f56ef2204a2f01302206b10e5303bd98aa2335ac82a3cf98577feb91edef6183511307c56a030a12c36412102df9ef2a7a5552765178b181e1e1afdefc7849985c7dfe9647706dd4fa40df6ac00000000

let wallet = HDWallet(mnemonic: "ripple scissors kick mammal hire column oak again sun offer wealth tomorrow wagon turn fatal", passphrase: "")!
        // Bitcoin example
        let coin: CoinType = .bitcoin
        // Get the default address
        let secretPrivateKeyBtc = wallet.getKeyForCoin(coin: coin)
        let publickey = secretPrivateKeyBtc.getPublicKeySecp256k1(compressed: true)
        let addressBtc = coin.deriveAddressFromPublicKey(publicKey: publickey)
//        let addressBtc = wallet.getAddressForCoin(coin: coin)
        print("Default BTC address: ", addressBtc.description)
        //bc1qpsp72plnsqe6e2dvtsetxtww2cz36ztmfxghpd
        // Build a transaction
        let toAddress = "bc1qllp4fuywlf0c5j3ncax9jsjyk9cfrkpvdhceft"
        let changeAddress = "bc1qpsp72plnsqe6e2dvtsetxtww2cz36ztmfxghpd"
        
        let outPoint = BitcoinOutPoint.with {
            $0.hash = Data(hexString: "6d2e9737f97b8443d7a54ec49d00f2bc3ac9be715b11727a293e8f04d4135212")!
            $0.index = 0
            $0.sequence = UInt32.max
        }
        let utxo = BitcoinUnspentTransaction.with {
            $0.amount = 11100
            $0.outPoint = outPoint
            $0.script = BitcoinScript.lockScriptForAddress(address: addressBtc.description, coin: coin).data
            
        }
        var input = BitcoinSigningInput.with {
            $0.amount = 600
            $0.hashType = TWBitcoinSigHashTypeAll.rawValue | TWBitcoinSigHashTypeFork.rawValue
            $0.toAddress = toAddress
            $0.changeAddress = changeAddress
            $0.byteFee = 2
            $0.coinType = coin.rawValue
        }
        input.utxo.append(utxo)
        input.privateKey.append(secretPrivateKeyBtc.data)

        // Calculate fee (plan a tranaction)
        let plan: BitcoinTransactionPlan = AnySigner.plan(input: input, coin: coin)
        print("Planned fee:  ", plan.fee, "amount:", plan.amount, "avail_amount:", plan.availableAmount, "change:", plan.change)

        // Set the precomputed plan
        input.plan = plan
        input.amount = plan.amount

        let outputBtc: BitcoinSigningOutput = AnySigner.sign(input: input, coin: coin)

        print("Signed transaction:")
        print(" data:   ", outputBtc.encoded.hexString)