Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 35666304967e3917d6f3a9a3d19085eb6e414b9ee70c46a76a8af7eab38c2c30:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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