Changing Column data in elasticsearch

Hii Team,

I have another task where i want to change some data which is already stored in ES, for example

Phone Number

9876543210

into

Phone Number

98765xxxxx

I just need to change this column in the indices which is already stored in ES and then afterwards make visualization in kibana.

or if there is any other way in kibana also where i can change 9876543210 to 98765xxxxx.

really need a help on this,

Thanks and Regards,
Sagar Mandal