Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 41ff5a27cab1100c7b60863f589b0e2365f2af08207b4aeec22c9b49e673cfd2:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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