How to reimport mesh without breaking all blueprints and references?

Okay so I tested this and I cannot find any way to fix this without fixing the animations. No matter what way I spin the dragon, it just resets him to a 90 degree spin when the animation starts. I’m very confused how spinning the mesh doesn’t work. If I spin him with transform in the blueprint then the animations rotate, but if I reimport the mesh with a -90 spin it doesn’t transfer like that to the blueprint. I’m so baffled by this.