Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 464af16c0c6df149e63e6b26282366b98e2b1b51d1696a0e694944aedb18b3ef:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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