Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 358c71a268354f76c8d10301e66b003b1deb2419fdad269becf7758c25a6b9e1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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