Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 80a41f76dd6fba6dbe56637a2aca1b82b722bff37a1085bf54f81a44d19425cf:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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