If you're using the pre-compiled binaries downloaded from the script, you do not want to (normally) apply newer updates manually.
Those binaries are sync'd to a specific db version and applying current changes manually can cause the server to become inoperable.
EDIT:
They are built against these values:
https://github.com/EQEmu/Server/blob.../version.h#L33
And are retrieved through the script by a call to world.exe with arguments:
https://github.com/EQEmu/Server/blob...d/net.cpp#L134
If we renamed the inventory table in 9122 and that update was applied manually, any 9121 binaries would croak trying to find the old table.