Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 14c3be130638dd59d84a8c8fea03be91f88b67a1904c683037191c32a4a9fea6:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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