diff --git a/lmfdb/knowledge/knowl.py b/lmfdb/knowledge/knowl.py
index df5d190675..1a42387af3 100644
--- a/lmfdb/knowledge/knowl.py
+++ b/lmfdb/knowledge/knowl.py
@@ -854,6 +854,7 @@ def __init__(self, ID, template_kwargs=None, data=None, editing=False, showing=F
             elif len(pieces) == 2:
                 # Table
                 self.title = f"Table {pieces[1]}"
+                self.coltype = None
                 if pieces[1] not in db.tablenames:
                     self.title += " (DEFUNCT)"
         #self.reviewer = data.get('reviewer') # Not returned by get_knowl by default
diff --git a/lmfdb/knowledge/main.py b/lmfdb/knowledge/main.py
index 895a443d01..e3b7ed8cf3 100644
--- a/lmfdb/knowledge/main.py
+++ b/lmfdb/knowledge/main.py
@@ -351,13 +351,10 @@ def edit(ID):
         title = "Edit Knowl '%s'" % ID
     elif knowl.type == 2:
         pieces = ID.split(".")
-        title = f"Edit column information for '{pieces[2]}' in '{pieces[1]}'"
-        knowl.title = f"Column {pieces[2]} of table {pieces[1]}"
-        from lmfdb import db
-        if pieces[1] in db.tablenames:
-            knowl.coltype = db[pieces[1]].col_type.get(pieces[2], "DEFUNCT")
+        if knowl.source:
+            title = f"Edit column information for '{knowl.source_name}' in '{knowl.source}'"
         else:
-            knowl.coltype = "DEFUNCT"
+            title = f"Edit description for '{knowl.source_name}'"
     else:
         ann_type = 'Top' if knowl.type == 1 else 'Bottom'
         title = 'Edit %s Knowl for <a href="/%s">%s</a>' % (ann_type, knowl.source, knowl.source_name)
diff --git a/lmfdb/knowledge/templates/knowl-show.html b/lmfdb/knowledge/templates/knowl-show.html
index f3be2f323d..dbe54f8360 100644
--- a/lmfdb/knowledge/templates/knowl-show.html
+++ b/lmfdb/knowledge/templates/knowl-show.html
@@ -4,7 +4,7 @@
 {% from "knowl-defs.html" import knowlbar with context %}
 {{ knowlbar(show_kid=True) }}
 
-{% if k.type == 2 %}
+{% if k.type == 2 and k.coltype %}
   <p>
     Postgres column type: {{ k.coltype }}
   </p>