Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Kshaiks
That is an error, in your Screenshot, above the version showing as requiring activation is a licenced version of the exact same Office . . .
Click this link and run through the Office activation troubleshooter:
https://support.office.com/en-us/article/unlice...
If that does not resolve this for you, follow these steps to perform a full repair of your Office installation . . .
Open Control Panel - Programs and Features
Click Microsoft Office in the list of installed applications
At the top, click 'Change'
On the resulting dialog, click 'Repair' - choose the Online Repair, it is a comprehensive fix
That should fix any issues with your Office Installation, including activation . . .