Message type: E = Error
Message class:  CNV_20200_CHECK - Messages for check functions (company code merge) 
Message number: 307
Message text: Participating credit control areas have different currencies
The participating credit control areas have different currencies.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Note that the system uses the settings form the reference credit control
area. After the company code merge, you must check the Customizing
settings for the credit control areas (table T001, T001CM and T014). In
addition, you must recreate the credit control data after the merge by
using report RFDKLI10.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20200_CHECK307 indicates that there is a mismatch in the currencies of participating credit control areas during a data migration or conversion process. This error typically arises when you are trying to migrate financial data that involves multiple credit control areas, and those areas are set up with different currencies.
Cause: Different Currencies: The primary cause of this error is that the credit control areas involved in the transaction or data migration are configured with different currencies. For example, one credit control area may be set to USD while another is set to EUR. Data Inconsistency: The data being migrated may reference multiple credit control areas that do not share a common currency, leading to inconsistencies.
Configuration Issues: There may be configuration issues in the SAP system where the credit control areas are not aligned properly in terms of currency settings.
Solution: Check Configuration: Review the configuration of the credit control areas involved.
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