Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4abb9e5aca4766e212e1d8b9f37b0c1dafc9a349db124a6c9784357543bf212b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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