Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 11fafc4995863452b49cfb29011d6ce5b31e637aaa58e6a1f3206fcffbb8a98d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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