Retarget animation bug in 5.6?

Hello, I am running into something I cant figure out. I am trying to retarget animation from a custom skeleton to a new metahuman one. I setup IKRigs for both skeletons and a retarget asset. In the retarget asset I set the preview settings to the animation I want to retarget and everything looks great.

When I try to retarget I get the error I pasted below. It does create the new retargetted animation asset however there is no animation on it at all.
Is this a bug? Doesnt seem like there is anything I am doing wrong since the preview looks correct.

/Game/Developers/JRiggs/AITests/Animations/animation Errors logged while validating asset Script Msg: /Game/Developers/JRiggs/AITests/Animations/animation : Provided Skeleton metahuman_base_skel does not match bound ControlRigObject SKEL_male_body_generic