Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 38f07765b0af43b203dfe1b87cdc9195669e1cc94c7b1aaebdf9cdd8642ce191:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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