Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
error: failed to save object: path /storage/cadenceExampleNFTCollection in account 0x9a5320853bfc61b0 already stores an object
   --> 9a5320853bfc61b0.ExampleNFT:305:8
    |
305 |         self.account.storage.save(<-collection, to: defaultStoragePath)
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^