Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3b128fc355715ac0501ab43ba3651f24231ddb1d1a9367ab89c0ec932d3060c2:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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