Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> faad22bfe726c635f7e925292bfcabe7f5d7ab3f6548c3ed97ec3374c26932eb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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