Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> fdd03d8970b8abddd8ca29c3d793591b9eb06b88dca4c4b50d136b939e4a7564:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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