Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 048dfd0c7fab1f55c3b0df0f07038b6fef1092697fa16cf909ec64b6b9ea253e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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