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: --> 855a78126f5e2bee74b9bf49d8e35f81d468b0b887a35eb8e2e987fc9e4cb3c2:45:16 | 45 | let nftId = TouchstoneFLOWFREAKS.mintNFT(metadataId: metadataId, recipient: self.CollectionPublic, payment: <- payment, serial: serial) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ --> cf0c62932f6ff1eb.TouchstoneFLOWFREAKS:308:20 error: pre-condition failed: This serial has already been purchased. --> cf0c62932f6ff1eb.TouchstoneFLOWFREAKS:183:4