Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b86c3c36e48c2b7c7f9857b954ff2a1961b43a689efb0df00274066cc2cba2df:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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