Merge pull request #5492 from segmentio/tanjinhong72-patch-3

Add faq that PII access is needed to see error messages in SQL trait

Author: rchinn1

src/unify/Traits/sql-traits.md

@@ -265,3 +265,6 @@ Check that you've configured the identifier that uniquely identifies users in a
 ### Why doesn't the identifier updated by a SQL trait show the correct value found in the column?
 
 Ensure that the name given to the SQL trait is not the same name as the identifier or column name from the query. To use SQL traits to update an identifier, the identifier will need to be a column in the query of your SQL trait. The column name in the query of the SQL trait should be the one that Identity Resolution uses to generate the identifier. 
+
+### Why can't I see error messages in SQL traits while other users can?
+To see error messages in SQL traits, you will need to have PII Access.