Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 25084ed1313685bbba36acc7ccd34178d94d4a8e9cce63f28b1218e6f917478c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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