Robocopy Error 1314 when copying file's permission

For testing purpose, I have mapped two share drives using AWS Ec2"A" as below:
Z:\ = Share drive from EC2"B"
Y:\ = Share drive from EC2"C"
After running command "robocopy Z:\ Y:\ /copy:DATSOU /secfix /e /z /MT:8", there is error
"ERROR 1314 (0x00000522) Copying NTFS Security to Destination Directory Y:\ A required privilege is not held by the client."
I have used command prompt with run as administrator and added the source user to target drive as full control.
May I know is there any recommendation for me to check/troubleshoot? Thank you!