This warning applies to the following situation:
Impact
You are unable to map all fields to desired categories, preventing you from importing transactions.
Explanations
We automatically determine whether some fields are possible or not. For example, we will not offer mapping a field to a category of "Revenue" if most values cannot be converted to a number. Or we will not offer mapping a field to a category of "Unique ID" if most values don't appear to be unique.
Resolution
To fix this issue, either:- Choose one of the proposed mappings
- Alter your data to conform with the desired mapping