Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 265470b301371b76e2ac4c572ecc9290196ba85dd6a006518f24b195c98cc513:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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