diff --git a/web/src/components/Inbox/VersionUpdateMessage.tsx b/web/src/components/Inbox/VersionUpdateMessage.tsx
index 7f8c2ed2..42ceb0bd 100644
--- a/web/src/components/Inbox/VersionUpdateMessage.tsx
+++ b/web/src/components/Inbox/VersionUpdateMessage.tsx
@@ -28,7 +28,6 @@ const VersionUpdateMessage = ({ inbox }: Props) => {
         id: inbox.activityId,
       })
       .then(({ activity }) => {
-        console.log("activity", activity);
         setActivity(activity);
       });
   }, [inbox.activityId]);
diff --git a/web/src/components/Memo.tsx b/web/src/components/Memo.tsx
index 5bebd086..50660289 100644
--- a/web/src/components/Memo.tsx
+++ b/web/src/components/Memo.tsx
@@ -42,7 +42,7 @@ const Memo: React.FC<Props> = (props: Props) => {
   const [shouldRender, setShouldRender] = useState<boolean>(lazyRendering ? false : true);
   const [displayTime, setDisplayTime] = useState<string>(getRelativeTimeString(memo.displayTs));
   const memoContainerRef = useRef<HTMLDivElement>(null);
-  const readonly = memo.creatorUsername !== extractUsernameFromName(user?.name);
+  const readonly = memo.creatorUsername !== extractUsernameFromName(user?.name || "");
   const [creator, setCreator] = useState(userV1Store.getUserByUsername(memo.creatorUsername));
   const referenceRelations = memo.relationList.filter((relation) => relation.type === "REFERENCE");
   const commentRelations = memo.relationList.filter((relation) => relation.relatedMemoId === memo.id && relation.type === "COMMENT");
diff --git a/web/src/components/MemoEditor/RelationListView.tsx b/web/src/components/MemoEditor/RelationListView.tsx
index 7915a7b4..f9aabcb7 100644
--- a/web/src/components/MemoEditor/RelationListView.tsx
+++ b/web/src/components/MemoEditor/RelationListView.tsx
@@ -28,8 +28,6 @@ const RelationListView = (props: Props) => {
     setRelationList(relationList.filter((relation) => relation.relatedMemoId !== memo.id));
   };
 
-  console.log("referencingMemoList", referencingMemoList);
-
   return (
     <>
       {referencingMemoList.length > 0 && (
diff --git a/web/src/components/MemoList.tsx b/web/src/components/MemoList.tsx
index c8ef4c12..f898d7a4 100644
--- a/web/src/components/MemoList.tsx
+++ b/web/src/components/MemoList.tsx
@@ -22,7 +22,7 @@ const MemoList: React.FC = () => {
   const user = useCurrentUser();
   const { tag: tagQuery, duration, text: textQuery, visibility } = filter;
   const showMemoFilter = Boolean(tagQuery || (duration && duration.from < duration.to) || textQuery || visibility);
-  const username = params.username || extractUsernameFromName(user.name) || "";
+  const username = params.username || extractUsernameFromName(user.name || "");
 
   const fetchMoreRef = useRef<HTMLSpanElement>(null);