Opening Balance entry notice unbalance

Hi All,

Im new user in ERPNext, i would like to transfer may accountancy report from my old system to ERPNext but i got totally confuse. really need help from expert user who familiar with this system. FYI, I had entry Currency exchange from USD to IDR from 01-01-2019 till now, next steps:

  1. I entered the opening balance, but when i try to save it gives the message as show on the screen below, any one familiar with this message as you see the amount debit and credit already balance.

  2. Related to the 1st problem i try to enter currency exchange from IDR to USD on 01-01-2019, the exchange should be 0.000068638 but when i like to save it the exchange going to 68.638

Need advice, Thank You