Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> bc038e1121cd4809d94ee767c2ae67c0a89def3b032e678a8ebee1983c46012e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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