Sync 2 different Blend Spaces that start with the opposite foot

I have 2 different Blend Spaces, but one starts with the right foot, other with the left, having the respective notifies in the respective order, I created a Sync group for both, but it is not working. Is there any way?

I’m considering mirroring one of the blend spaces and inverting the notifies, but if I do that, I’d have to do in all animations, and do it on all blend spaces that start with the right foot. Easier than making the animations again, but I’m looking for another way.