Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 98800bc094af66893b8267e95e75ae14e5b31ff2e1ec4d1485185025cf95736e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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