Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4edbdc032267ba71042adc5f4d2a338b71fee47a798e3f57854ac7a9e423cc66:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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