Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> eda8a243f4cea1828c59fd14a58c5dce6e94d824d559cd2aaf917c5bcd53cd14:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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