Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> eba2b19aabe0fbdd51bf30dd5c41e2d96ebe7930bd31845b9b526fc2259f50ad:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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