I followed the steps mentioned in: 18.04 Change shortcut for switching workspace - Ask Ubuntu, to change Keyboard shortcuts to switch to another workspace, as can be seen in the following picture:
Most of the times this works. But, sometimes this shortcut that I have set Super+1 and so on conflicts with the other shortcut: The icons on the dash or Ubuntu Dock (on the left edge of the screen gets switched) as shown in the following figure: (You can observe that numbers appear at the bottom of each icon.)
How can I completely disable or change the shortcuts to switch apps on the vertical dash, so that it doesn't conflicts with my workspace switching shortcuts?