Oracle application 11.5.10.2 patch level 11i.HR_PF.K.1(5055050) what is the patch to be applied

If we forget to apply the ORACLE HRMS family pack in 11i environment before R12.1.upgrade. is it possible to apply
ORACLE HRMS family pack rollup 6 in   R12 environment  what is the patch to be applied?

My current version in 11.5.10.2

hr_pf 11i.HR_PF.E(2803988) 11i.HR_PF.K.1(5055050)

SQL> select bug_number, creation_date from ad_bugs where bug_number='5055050';

BUG_NUMBER                     CREATION_
------------------------------ ---------
5055050                        28-AUG-07

11i.HR_PF.K.6(10015566) Patch-Released (NOT APPLIED)

thanks and best regards

Anand Sathyamurthy