Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a2541adf07120228c628e56990f028eba2550996ae5d653a1eff80f3fd35e4dc:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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