Can't update Naming Series in Material Request

[anupd]

I was trying to update the naming series in material request as shown:

However, I get this error.

[mangroliya]

Hi, if you want different naming series, than you can set it from naming series option under settings menu.

For different naming series you don’t need to customize Do type.

[SherinKR]

Hi, From the Naming Series Doctype you can achieve the same like below.

Thanks