How make the change in mesh apply to all LOD ?

Development Asset Creation
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1

Hello.
I modified the default character (manny manequin) in Unreal editor but change dont apply to the LOD so to the game… the only way i found to apply the change is to delet all the LOD and keep only LOD 0 …
what is the procedure from Unreal editor to apply the mesh change to the LOD ? (i made all this directly in the Unreal editor )

thanks you