Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> db2261b552fb46b7213706ccaa3770c2ae3f4c25da8b4293fa02ebe3b1aca6b1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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