Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> eb033730d78ebc6785871afcf7c165b99174f905cd79428bbbf092a8d42a292a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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