Merge Customer Record >Error: Company XXX cannot be merged or deleted because it has a different currency than the master

Consider the following scenario:

1. Company B has to be merged into Company A
2. Company B has USD currency and Company A has currency AUD
3. When merging these two records, the merge fails with error message on the Duplicate Resolution Status screen:
    "Company B cannot be merged or deleted because it has a different currency than the master"

Solution:

Enable the feature: Multi-Currency Customers
1. Navigate to Setup>Company>Enable Features
2. Enable the Feature under the Company tab> International section
3. Click Save

By enabling this feature, this will allow 2 or more currencies on the Customer record being merged into (Company A).
To verify this after merging:
1. Edit Company A record
2. Click on the Financials tab then click Currencies
3. Both currencies will show

Note:  Users cannot disable the Multi-Currency feature if at least one Customer record has multiple currencies.