Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c41bf46e0e288db56a32fa454b06e8d17ccb2689b04a9a4a00efe4bc746ce814:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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