Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ca0e28a0eb6ed7004b2a146436a1aa7258511999e8a8eb525d96b243d433521e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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