Hi Lalatendu,
If the 13.1 entries are missing from the install history table, then I guess, your upgrade didnt go well.
You can see the same table below, when we upgraded from 13.0 to 13.3.
And on checking the change impact and upgrade guide of v13.3, for your v12.0.6 version, the upgrade has to go through 12.1.1, 13.0, 13.1, 13.2 and 13.3 stages as shown below:
I also found the suggestion marked in the red box telling you to upgrade first to a v12.1 version if your current clarity version is one before v12.1, which is true in your case.
Regards,
Georgy