Pavan,
Upgrading the "Virtual Hardware", now called VMWare "Compatibility" is a separate issue from upgrading VMWare Tools.
All my other VMs are on VM Version 13 (ESXi 6.5 and later). My CPPM VM installed as VM Version 8 (ESXi 5.0 and later).
Are there any issues upgrading the Compatibility from v.8 to v. 13?
CPPM also installs with VM Tools version 9536. I have upgraded this to version 10357.