Following the advice of another user in another question, I am asking this.
As I said, I have been asked to start grooming a successor in the team where I have worked for 3 years (and managed for 1 year), so I can focus more on helping other teams. I have been given various reasons, but... you never know!
In the long run, I would like to keep climbing the managerial ladder (I enjoy people coordination in general, working across multiple functions, etc. etc.), so I am a bit afraid of losing my seniority from my previous team.
What can I do, while grooming a successor and being asked to do this lateral move, to ensure that I am still valuable to that team (and the whole organization for that matter)?
Note: I am a business analyst, and I do use some advanced IT/software.