Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a0d10405a32d8b1b9fe0b83950136e87847a5f2a45a90dba856ba68de8bec17a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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