Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 7787584aadb50185b348b406b262030df99a31c38c1f7302f1ab06e5b3329128:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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