Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 290b778d7d53c661781cb6a16c46f7f9f482d8a5af315c1192990a1e748e21d1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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