Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b253bb20a0d73dd5aea0470132a625b2bff702ce4eb9410dfa1a94887f636e57:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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