Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c88d2c6591f0947974676af62256a9b5c371c82b12a59ee2cbdf40c527be42d7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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