The source project of this merge request has been removed.
SHIFT+Keypad key send the the keypad key, not the number and vice versa.
I found a similar request here https://bbs.archlinux.org/viewtopic.php?id=257020 and based myself on this topic to find the solution.
In konsole of KDE, I use a lot SHIFT+Page_Up and SHIFT+Page_Down to scroll the screen up and down, this commit propose simplify numpad configuration and not swap from base to number when we press on shift and vice versa And when we press SHIFT+Page_Up works as SHIFT+Page_Up and the same behavior for all other keys of numpad.
I'd like replace Shift with AltGr but per https://gitlab.freedesktop.org/xkeyboard-config/xkeyboard-config/-/blob/master/docs/README.enhancing#L279 KEYPAD only have 2 modifiers ...