Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e620e0125d1543ccbb7d79bdce42cee20686f0595de427b69f3e9fb6c1d88efd:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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