Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 124690923d86ce22b830e054aac31afd94ac69668290bddf247a9dc2da757a1f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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