diff --git a/backend/canisters/community/CHANGELOG.md b/backend/canisters/community/CHANGELOG.md
index a02c387bd4..d9ddfc41b5 100644
--- a/backend/canisters/community/CHANGELOG.md
+++ b/backend/canisters/community/CHANGELOG.md
@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Remove UserId from member map values since it's already in the keys ([#6945](https://github.com/open-chat-labs/open-chat/pull/6945))
 - Disallow sending prize messages to threads ([#6960](https://github.com/open-chat-labs/open-chat/pull/6960))
+- Re-run member migration to stable memory using reduced size format
 
 ### Removed
 
diff --git a/backend/canisters/group/CHANGELOG.md b/backend/canisters/group/CHANGELOG.md
index 273fd25b8e..de6f8281a2 100644
--- a/backend/canisters/group/CHANGELOG.md
+++ b/backend/canisters/group/CHANGELOG.md
@@ -8,6 +8,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Changed
 
+- Re-run member migration to stable memory using reduced size format
+
+## [[2.0.1491](https://github.com/open-chat-labs/open-chat/releases/tag/v2.0.1491-group)] - 2024-12-03
+
+### Changed
+
 - Remove UserId from member map values since it's already in the keys ([#6945](https://github.com/open-chat-labs/open-chat/pull/6945))
 - Disallow sending prize messages to threads ([#6960](https://github.com/open-chat-labs/open-chat/pull/6960))
 
diff --git a/backend/canisters/group/impl/src/lib.rs b/backend/canisters/group/impl/src/lib.rs
index 81a657078a..7dda807411 100644
--- a/backend/canisters/group/impl/src/lib.rs
+++ b/backend/canisters/group/impl/src/lib.rs
@@ -471,7 +471,7 @@ struct Data {
     expiring_member_actions: ExpiringMemberActions,
     user_cache: UserCache,
     user_event_sync_queue: GroupedTimerJobQueue<UserEventBatch>,
-    #[serde(default)]
+    #[serde(skip_deserializing)]
     members_migrated_to_stable_memory: bool,
     stable_memory_keys_to_garbage_collect: Vec<KeyPrefix>,
 }
diff --git a/backend/libraries/group_chat_core/src/members.rs b/backend/libraries/group_chat_core/src/members.rs
index f381f70d87..be932e06ec 100644
--- a/backend/libraries/group_chat_core/src/members.rs
+++ b/backend/libraries/group_chat_core/src/members.rs
@@ -41,9 +41,9 @@ pub struct GroupMembers {
     suspended: BTreeSet<UserId>,
     updates: BTreeSet<(TimestampMillis, UserId, MemberUpdate)>,
     latest_update_removed: TimestampMillis,
-    #[serde(default)]
+    #[serde(skip_deserializing)]
     migrate_to_stable_memory_queue: VecDeque<UserId>,
-    #[serde(default)]
+    #[serde(skip_deserializing)]
     migration_to_stable_memory_complete: bool,
 }