Change accounting doc.type for price chagen (MR21)

Dear Guru,

Can we change accounting doc.type for price change (MR21)?

I'm try to see in SPRO, read document and setting in TC: OMW9 but I still can not change doc.type.

It still be "PR". (Standard doc.type)

Please kindly help me step by step.

Thank you very much.

Saiyaman