Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 98ccd7e14b666401e2c3471a88ea0b3d1663da115c790fd4e7562461889be205:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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