that means there’s a multiple motor6d on uppertorso, check the motor6d on uppertorso and see if there’s any multiple motor6d, if there is then delete it
Edit : what i mean is maybe you misclicked and attached uppertorso to uppertorso, or maybe you have attached a motor6d to UpperTorso → RightUpperArm, but then you attached it again with the same parts and that error happens
Ok I noticed that. But I think you need to have multiple motor6d on the uppertorso for rigging, that’s what I saw in tutorials so I’m confused on that.
For example I attached torso to left arm and torso to right arm and torso to head, making them connect
As a result there are 3 or 4 motor6Ds in the uppertorso. I don’t know if this is right but I watched tutorials and that’s what people did.
you probably have 2 or more of the same motor6d with same target assign
just delete one that is duplicated.
look into all parts of your model for any motor6d with same targets at the ones inside of torso.