Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4d2e2ce74b472e17e475dd765c4d48d30b313d86ad78af9368320f35fdca3fc5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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