Cemetery is the place where people bury their dead relatives, which represents people's thoughts and respect for their dead relatives. In the cemetery, every tombstone is equal, and no tombstone is more important than others. Therefore, if you need to move the grave, you can follow the normal procedures and don't have to worry about the impact on the original cemetery Feng Shui.
In short, we should believe and respect science, and don't blindly believe in superstitious behaviors such as geomantic omen.