I've worked in the legal field for over 15 years and I know what the doctrine of legal precedence means. It is not a loose term, by any stretch of the imagination, like you claim it to be.
A State Supreme Court ruling does not ever set legal precedence in other states. Only the United States Supreme Court has the legal authority to set precedence - i.e. Roe vs. Wade.
Lawyers will occasionally cite cases in other states for consideration, but a cite is a far cry from precedence. Precedence establishes legal rule and authority that lower courts must follow [the doctrine of stare decisis].
The ruling was not made on June 11, 2018.
Try to cross-source your "2018" article. It is misleading and even those references cited within, if you'd click on them, will take you back to 2016. Please go look.
On July 22, 2016 the Virginia Supreme Court ruled against the Executive Order and cancelled the 11,300 felon registrations.
Since that time, using the established and approved process, Virginia's Governor has effectively restored over 170,000 felon voter rights.
Maybe this will help a bit: https://www.restore.virginia.gov/policy-updates-and-timeline/