Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3d31702b30a92453834be39f6e55d97558df99e3ceb0afaa57231659f25f7711:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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