Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1537a078e73286a2355ad1f37b392d98da9413a3b4a4f43a34023f05d9a0927c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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