Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4f4605763f509573f1a0441d0289a1f3b506c0ff323dfddced0ecc1a4848fefc:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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