Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 58326c4ca62fac542611057ff079e14be9f2bd07c0ef06dd01739783999298e0:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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