DOCSP-34511 clarify c field limitation (#6000) (#6015)

ltran-mdb2 · web-flow · commit 10a0dfb8270f · 2024-01-26T11:15:08.000-05:00
* DOCSP-34511 clarify c field limitation * DOCSP-34511 clarify c field limitation
diff --git a/source/reference/command/update.txt b/source/reference/command/update.txt
@@ -176,7 +176,8 @@ Each document contains the following fields:
      - document
      - .. _update-command-c:
      
-       Optional.
+       Optional. You can specify ``c`` only if :ref:`u
+       <update-command-u>` is a pipeline. 
 
        .. include:: /includes/let-variables-syntax.rst
 
