Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f3b001122ec5fe3addcd33dc0ee1524058db302a83986b72b20c2f19762f0a5c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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