Need help to solve the error: "This version of macOS 10.14 cannot be installed on this computer."

Hello I'm Sagnik Ganguly, I'm trying to dual boot macOS 10.14 and Windows 10 (already installed) on a PC with Legacy BIOS. I've two hard drives one in where the windows is installed and another which is converted to GPT to install macOS Success' href='/2020/12/install-macos-mojave-on-supported-pc.html'>Mojave 10.14 with a partion of Mac OS Extended (Journal) or APFS but when I went to the "Select the disk where you want to install macOS" page, all the partitions listed there (including, the APFS partition) are grayed out (disabled) and when I'm selecting the APFS partition it says "This version of macOS 10.14 cannot be installed on this computer.", can anyone help me please?

P. S. My motherboard doesn't support UEFI.

SYSTEM INFORMATION: https://drive.google.com/file/d/1M7-HNEqdf511y6omn_EyTn7bOfGbDm9r/view

Author: @SagnikGanguly96