Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e01e3641a69e0b47d6318c4045e910ed8511a1abf70cee57c08d59817cbd8ac3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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