Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a237306a6406d3b9ca7c5582ab44ac433bbb0e0596e2c4b92923a01af0924d8e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

error: pre-condition failed: listing has already been purchased
   --> 4eb8a10cb9f87357.NFTStorefront:243:16