Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 05788a898d7005060973ffeadedbdbe58fb2a1df15c6b5f9560596fc47da0d4b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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