Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 13a30ecf25707ea525f219e7b5954f91063f01798a3f15564ba9b34b6cbb06d3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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