Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Nadeem,
It is an expected behavior that you will receive the error message if you try to install a Windows Installer Based Office when you have other Click-to-Run installer based Office programs installed on your computer.
Click-to-Run is the technology used to install Office 365 subscription and most other Office 2013 and Office 2016 products. Windows Installer technology (MSI) is used to install the volume license editions of Office, like Microsoft Office Professional Plus and Microsoft Office Standard.
You can't have Office products of the same version (like 2013 or 2016) that use two different installation technologies installed on the same computer. This also applies to standalone applications like Access, Visio, Project, Skype for Business, or OneDrive for Business.
For more information, you can refer to the following article.
Office installed with Click-to-Run and Windows Installer on same computer isn't supported.
As a workaround, you can install different version of these two products, for example, Project 2013 (MSI) and Office 2016 (CtR).
Thanks,
Ran