One you have completed the quest “Mmmmmm, Soulglazed Relics,” you will be able to alter the materia-enhanced properties of your relic weapon novus or relic weapon nexus. Prepare a new sphere scroll of the correct type to receive the power of your chosen relic weapon, then use materia and alexandrite to redo the infusion process.
* The materia-enhanced properties of a relic weapon nexus will be transferred to a sphere scroll after being adjusted to item level 110 values.
This is the text from the patch notes. Anybody knows / tried what we have to do exactly? If we simply have to redo the entire 75 alex and materia allocation, why does it have the transferring properties part?

Search the net and somehow nobody knows for sure yet.