Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c88d2e0b40e0413c2d8f70030898b5f4116cb5496b8d3b7aa3711227f6d01b25:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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