Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e1d6df0132babd94db92d17ec25680ecc924e5525ffa19074e0788985777a63f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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