The pop-up says 'The entered license key is only valid for an older version of Polaris Office' when you install Polaris Office Lifetime version?

When you install Polaris Office Lifetime version and you put license key, but the pop-up says 'The entered license key is only valid for and older version of Polaris Office.'?'

This problem happens when you enter the old product license key in the new product program for Polaris Office PC (Lifetime).

[How to download Polaris Office PC (Lifetime) old version program]
1. Delete the installed Polaris Office PC (Lifetime) program first.
2. Go ahead to Polaris Office website: https://www.polarisoffice.com/en/download

3. Click download more installation files

4. Download Windows or Mac