Replication between PS6010 and PS410 issue

Dear Friends
We need to backup volumes at old array to new array

- Old array ( PS6010 with firmware V4.3.6 ) - Old Group
- New array ( PS4110 with firmware V7.0.9 ) - New Group

after i configured replication between two group when i try to replicate volume from Old Group to New Group it fail with error : .
iSCSI: Unknown response code

but replication from New Group to Old Group success without any error

is there any way to clone volumes from old array to new array ( online )?