Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cbac210e140081dc7ecb0e4e6c61ce2c902b1a758552f16e60c53f51b2430ded:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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