Sending consecutive transactions will result in an error. Using the simple-transaction example below, a transaction is created in Cardano-Serialization-Lib and sent to the blockchain using BrokFrost.
https://github.com/blockfrost/blockfrost-js/tree/master/examples/simple-transaction

At this time, after one transaction is sent. If I create and send transactions consecutively without waiting for a time, I may get the following error and not be able to send.

Transaction db6388f73ed195c30ea264dc968ea364d16fa7a097ddae0236d9fbf1fa150df8 rejected"transaction submit error ShelleyTxValidationError ShelleyBasedEraBabbage (ApplyTxError [UtxowFailure (UtxoFailure (FromAlonzoUtxoFail (ValueNotConservedUTxO (Value 0 (fromList [])) (Value 206069713 (fromList []))))),UtxowFailure (UtxoFailure (FromAlonzoUtxoFail (BadInputsUTxO (fromList [TxIn (TxId {_unTxId = SafeHash \"607d1531d04bb56da9a6145c784ae2c1b59980ca3703b78777404516d41e93b5\"}) (TxIx 1)]))))])"

I believe this is due to the UTxO not being updated, is there any way to resolve this? Also, in this example, what condition is specified in the UTxO of the transaction's Input?
What I would like to achieve

• We want to create and send a transaction without time after sending once. Example Send 100 transactions per minute from one address.

What we want to know

• If there is another way to specify the UTxO of Input, is it possible to create and send transactions continuously by changing it?

Sending consecutive transactions will result in an error. Using the simple-transaction example below, a transaction is created in Cardano-Serialization-Lib and sent to the blockchain using BrokFrost.
https://github.com/blockfrost/blockfrost-js/tree/master/examples/simple-transaction

At this time, after one transaction is sent. If I create and send transactions consecutively without waiting for a time, I may get the following error and not be able to send.

Transaction db6388f73ed195c30ea264dc968ea364d16fa7a097ddae0236d9fbf1fa150df8 rejected"transaction submit error ShelleyTxValidationError ShelleyBasedEraBabbage (ApplyTxError [UtxowFailure (UtxoFailure (FromAlonzoUtxoFail (ValueNotConservedUTxO (Value 0 (fromList [])) (Value 206069713 (fromList []))))),UtxowFailure (UtxoFailure (FromAlonzoUtxoFail (BadInputsUTxO (fromList [TxIn (TxId {_unTxId = SafeHash \"607d1531d04bb56da9a6145c784ae2c1b59980ca3703b78777404516d41e93b5\"}) (TxIx 1)]))))])"

I believe this is due to trying to use the same Input for the first transaction and the second transaction , is there any way to resolve this? Also, in this example, what condition is specified in the UTxO of the transaction's Input?
What I would like to achieve

• We want to create and send a transaction without time after sending once. Example Send 100 transactions per minute from one address.

What we want to know

• If there is another way to specify the UTxO of Input, is it possible to create and send transactions continuously by changing it?