Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3ef1d2e689a9ab89045a564bf3425a28d321ff91fda89eb8b64f5132ecdf805c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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