Particle hair is duplicated when changing character pose

[Solved] - by accident I had a duplication of its scalp.

Hello All,

I have a particle hair coming out from a scalp; the scalp is a separated object (from my character’s head); the particle system has dynamics disabled.
The scalp is parented to the head’s main bone and the hair is following fine the head for different poses. However, the hair is being duplicated as its original rendering also shows up in the new pose; as result I have the updated hair for a current pose plus the older hair.

I appreciate if anyone could provide a fix for this.

Thanks