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: --> a770776835e9c9e221b3137da7d7e6b4fa154a550a28b4bfe9200431fcdbfa6c:80:20 | 80 | let item <- self.listing.purchase( 81 | payment: <-self.paymentVault 82 | ) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: pre-condition failed: listing has already been purchased --> 4eb8a10cb9f87357.NFTStorefront:243:16