Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0372e83d1541b71af6d8c2c161f60633eb404eb24e83ab045089f5e27fe8d2bb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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