Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 962ac2890b90bf3b969db9d4117c0140dcb0fab09079fd9f3e47b28800d58af2:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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