Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f1defff4e5fed45f5ef86821388a9d7133f5bd37ce7c9610d0b3fca413bfe18e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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