7mode snapmirror version for source and destinations

I'm aware of the rule that one's 7mode Snapmirror  destination ONTAP version must be higher than source, but wondering whether this applies to P number too ?

So, i have a large , thousands of users cifs / nfs filer running presently 824P4, which a slew of source snapmirror filers on 8.1.2P4. 

I'm in process of upgrading all of this estate and more to 824P6. 

Question is am i able to update my snapmirror sources to 824P6 and leave the single destination at 824P4 ?  

Would a difference in patch # break snapmirror ?

Thanks 

jc