Merge pull request #6996 from segmentio/tanjinhong72-patch-14

Add FAQ about the undefined traits error to Salesforce Actions page

Author: pwseg

src/connections/destinations/catalog/actions-salesforce/index.md

@@ -186,6 +186,9 @@ When using the `create` operation, it's possible for duplicate records to be cre
 
 Please note this is only a concern when using the `create` operation. You can use the `upsert` operation instead to avoid duplicates if `upsert` meets your needs.
 
+### Why do I see "undefined traits" error?
+This error happens when you use the `update` operation, but no value is provided for the field defined as the Record Matcher. To fix this, make sure your payload includes a value for the Record Matcher field.
+
 ### How does Salesforce Bulk API work?
 When **Use Salesforce Bulk API** is enabled for your mapping, events are sent to [Salesforce’s Bulk API 2.0](https://developer.salesforce.com/docs/atlas.en-us.api_asynch.meta/api_asynch/asynch_api_intro.htm){:target="_blank"} rather than their streaming REST API. If enabled, Segment will collect events into batches of up to 5000 before sending to Salesforce. Bulk support can be used for the `upsert` or `update` operations only.