Unipolar stepper motors ?

Hello ,

I need an advice as i have Nema 23 Unipolar stepper motor with 6 wire leads and rated current 2A/Phase
and the motor has 4 phrases .

Then i want convert it to bipolar stepper motor as you see in image .

So my question is when i joined the two phrases to each other that's will double current or not for the motor ?

Thanks