How to upgrade VirtualBox Guest Addition on Oracle Solaris

In the event of upgrading to Oracle VirtualBox 5.0.22, I had to upgrade the VirtualBox Guest Addition on my Oracle Solaris 11.3 guest machine, which resulted below error;

root@aqua:/media/VBOXADDITIONS_5.0.22_108108# pkgadd -d ./VBoxSolarisAdditions.pkg 

The following packages are available:

  1  SUNWvboxguest     Oracle VM VirtualBox Guest Additions

                       (i386) 5.0.22,REV=r108108.2016.06.16.14.45

Select package(s) you wish to process (or 'all' to process

all packages). (default: all) [?,??,q]: 

Processing package instance <SUNWvboxguest> from </media/VBOXADDITIONS_5.0.22_108108/VBoxSolarisAdditions.pkg>

Oracle VM VirtualBox Guest Additions(i386) 5.0.22,REV=r108108.2016.06.16.14.45

Current administration requires that a unique instance of the <

SUNWvboxguest> package be created.  However, the maximum number of

instances of the package which may be supported at one time on the

same system has already been met.

No changes were made to the system.

root@aqua:/media/VBOXADDITIONS_5.0.22_108108#

After searching on internet, figured out, we got to uninstall the older version, before installing the newer one.

So, uninstall the old package first. 

root@aqua:/media/VBOXADDITIONS_5.0.22_108108# pkgrm SUNWvboxguest

Then install the new version;

root@aqua:/media/VBOXADDITIONS_5.0.22_108108# pkgadd -d VBoxSolarisAdditions.pkg