H1B Extension - What is the process of changing job title in I129

I need to file my extension soon and before that I need clarification on following -

My current I129 job title is ‘Computer Programmer’ and this year my extension was done under the same tile ‘Computer Programmer’ & I got approval for 10 month only. And for my next extension I`m planning to change my title as per my Current Roles & Responsibilities which is ‘Database Administrator’.

Can you please help telling what is the process changing the role?