How do I correctly use `setError` with a dynamic field name in React Hook Form?

When using dynamic field names, ensure the field name is correctly constructed and passed to `setError`. Use template literals or string concatenation to build the name dynamically. For example: `setError('dynamicFieldName_' + index, { type: 'required', message: 'This field is required' });`. Verify the dynamic name is consistent with how you registered the field using `register`.