Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b3eaf4e613ca954aba7a89ea9a108642126b115af1db54b0c1f0da6618d4dbac:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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