Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c5bde26bcd34bf1115c45cb2562f3febc9f042f2c54992a617c98734eb7af6b8:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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