How do I cast more than 1 Chrono Boost?

I’ve been trying to edit the “Nexus- Chrono Boost” ability in the editor to be able to create multiple Chrono Boosts from one unit, but I can’t seem to find what needs to be changed.

Currently, when I try to cast Chrono Boost on a second structure, it cancels the previously cast Chrono Boost on the first structure. How do I make it so it doesn’t cancel the previously cast Chrono Boost?