Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cd328e98be9f27ff6615aae3cdf75c9b99b5052c98a7b097e41a0755a1def287:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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