I am trying to use 'Copy Customization' feature, but unfortunately it can not be initiated because it has multiple currencies

I assume this is because two CRM has two different currencies. the Source Account uses IDR (Indonesian Rupiah) and the target account has SGD (Singapore Dollar). the target account is actually a new account, but unfortunately I set SGD in the initial set up.

I think I need to change the target account to IDR first and then later, after I perform Copy Customization, I will change the currency back to SGD, but unfortunately I can't find a button to change the currency. like this

so how to solve this issue?