Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 72292f2e164712f468181a841287a1316f4d35fd68f541bec11bc5425529ecc9:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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