Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4ce591d7229b17227df67259b80355fb674159abdf8e5f1fe92ccd2b79868183:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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