Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1dacc4da6c7a12c61f65caa00db751cbc52dfebc0b5709524634d907d23c3f5e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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