Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d53a7f5340cc37c7531a48e9e3c7255bfaa04c815d14c3b5ff0220e5e94a5eda:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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