Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
 --> 724e50b5e4335c603f3271ccad4ba2119ae487ca23ccb4b2435279a17ebf56b3:5:6
  |
5 |       FlunksGraduationV2.graduateFlunk(owner: signer, tokenID: tokenID)
  |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: failed to force-cast value: expected type `MetadataViews.Serial`, got `MetadataViews.Serial?`
  --> 807c3d470888cc48.FlunksGraduationV2:58:15
   |
58 | 		let serial = serialView as! MetadataViews.Serial
   | 		             ^^^^^^^^^^