Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f5e1448413e1771a838a66398ae5f7a4c97626d07859f752b382be95d59515a3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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