Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> fe24fb4a0b1923815b628a8c68e053c2d10587c030f94cfaf758a18248a65a89:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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