Cannot Export VMD, getting errors

[artemis1031]

I'm trying to make my own motions in Blender to import and use in MMD, but when I try to export, I get these errors. I 'm not a smart cookie and can't make heads or tails of this. Please help?

Traceback (most recent call last):
File "C:\Program Files\Blender Foundation\Blender 3.3\3.3\scripts\addons\mmd_tools\operators\fileio.py", line 631, in execute
vmd_exporter.VMDExporter().export(**params)
File "C:\Program Files\Blender Foundation\Blender 3.3\3.3\scripts\addons\mmd_tools\core\vmd\exporter.py", line 489, in export
vmdFile.boneAnimation = self.__exportBoneAnimation(armature)
File "C:\Program Files\Blender Foundation\Blender 3.3\3.3\scripts\addons\mmd_tools\core\vmd\exporter.py", line 258, in __exportBoneAnimation
assert(key_name not in vmd_bone_anim) # VMD bone name collision
AssertionError

EDIT: i found a work around, I no longer need a solution.
Apparently, you should NOT delete anything from the model you're working with. I had deleted the joints and collision out of habit, since they often get underfoot when making clothing for my models. This took me 2.5 days to figure out, lol.