Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ede634ea9d9690468f0270e9f93068bd6f4cc64e88cc7a018986827be3be1982:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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