CODE_ERROR

There is an error in the cadence code of this transaction.

[Error Code: 1101] error caused by: 1 error occurred: * transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed: --> 6bc37ac5b2d9fdcfc61e8d7d6ff0832017ed28d9c7c2db3163015526a7725ee7:71:16 | 71 | let nftId = TouchstonePartyFlavorz.mintNFT(metadataId: chosenMetadataId!, recipient: self.CollectionPublic, payment: <- payment, serial: chosenSerial!) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ --> c4b1f4387748f389.TouchstonePartyFlavorz:307:20 error: pre-condition failed: This serial has already been purchased. --> c4b1f4387748f389.TouchstonePartyFlavorz:182:4