You are using Vertices groups to bind armature to mesh : so you'll have to

• Delete the duplicated vertices groups
• Fix/reassign the needed ones ( Head, Body, Arm_L, Arm_R, Leg_R and Leg_L )
• Use only one Armature modifier ( delete the others )

You are using vertex groups to bind armature to mesh : so you'll have to

• Delete the duplicated vertex groups
• Fix/reassign the needed ones ( Head, Body, Arm_L, Arm_R, Leg_R and Leg_L )
• Use only one Armature modifier ( delete the others )