Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e32d139df0c77edd22c73e2071034578a49cd689b050f63bbd5f6af9f46a8279:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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