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: --> 4c809cb6ae887b4ef3996b2dc55fe62931b6fabf13fa4a73100aa495e8ac295f:72:36 | 72 | let item <- self.listing.purchase( | ^ error: pre-condition failed: listing has already been purchased --> ccf47e1c6ad2d2bd.NFTStoreFree:138:16