Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 30917dfb091d97fa971243d207d52e53e5caa14bf3d8d8bad236d7427db6a5d0:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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