diff --git a/analyzers/ngram_stats/interface.py b/analyzers/ngram_stats/interface.py
index c8c731a..d9b480d 100644
--- a/analyzers/ngram_stats/interface.py
+++ b/analyzers/ngram_stats/interface.py
@@ -71,7 +71,7 @@
                 OutputColumn(
                     name=COL_AUTHOR_ID,
                     data_type="identifier",
-                    human_readable_name="unique username",
+                    human_readable_name="unique userID", # Updated from "unique username"
                 ),
                 OutputColumn(
                     name=COL_NGRAM_REPS_PER_USER,
@@ -83,11 +83,6 @@
                     data_type="identifier",
                     human_readable_name="UPN",
                 ),
-                OutputColumn(
-                    name=COL_MESSAGE_ID,
-                    data_type="identifier",
-                    human_readable_name="post identifier",
-                ),
                 OutputColumn(
                     name=COL_MESSAGE_TEXT,
                     data_type="text",