Deactivation of new objects during upgrade

Hello Gurus,

Iam working on a upgrade project 4.6C to ECC 6.0 , i had completed till SU25 2(B) activity.

I had executed su25 2(C) step and adjustd few roles, but there were few new objects coming in i was able to get values for FI and MM objects from respective functionals.

But HR guys are not able to provide values for the new objects, new objects are like p_pernr , P_origin e.t.c

My questions is, if i deactivate these new objects will there be any authorization issue , the transactions which are working in R3 will work properly or will there be any issue ?

2. Also please let me know, what are precuationary measures to be taken before adjustintg the new transactions in SU25 2(D) step.

Thanks,

Sanketh.