diff --git a/src/discord/monitor/message-handler.process.ts b/src/discord/monitor/message-handler.process.ts
index 6d502be21..e9901d07e 100644
--- a/src/discord/monitor/message-handler.process.ts
+++ b/src/discord/monitor/message-handler.process.ts
@@ -302,7 +302,7 @@ export async function processDiscordMessage(ctx: DiscordMessagePreflightContext)
     ctx: ctxPayload,
     updateLastRoute: isDirectMessage
       ? {
-          sessionKey: route.mainSessionKey,
+          sessionKey: route.sessionKey,
           channel: "discord",
           to: `user:${author.id}`,
           accountId: route.accountId,
diff --git a/src/imessage/monitor/monitor-provider.ts b/src/imessage/monitor/monitor-provider.ts
index 491071699..05e46436d 100644
--- a/src/imessage/monitor/monitor-provider.ts
+++ b/src/imessage/monitor/monitor-provider.ts
@@ -510,7 +510,7 @@ export async function monitorIMessageProvider(opts: MonitorIMessageOpts = {}): P
       updateLastRoute:
         !isGroup && updateTarget
           ? {
-              sessionKey: route.mainSessionKey,
+              sessionKey: route.sessionKey,
               channel: "imessage",
               to: updateTarget,
               accountId: route.accountId,
diff --git a/src/line/bot-message-context.ts b/src/line/bot-message-context.ts
index 8a1c049d2..77b6264b5 100644
--- a/src/line/bot-message-context.ts
+++ b/src/line/bot-message-context.ts
@@ -282,7 +282,7 @@ export async function buildLineMessageContext(params: BuildLineMessageContextPar
   if (!isGroup) {
     await updateLastRoute({
       storePath,
-      sessionKey: route.mainSessionKey,
+      sessionKey: route.sessionKey,
       deliveryContext: {
         channel: "line",
         to: userId ?? peerId,
@@ -432,7 +432,7 @@ export async function buildLinePostbackContext(params: {
   if (!isGroup) {
     await updateLastRoute({
       storePath,
-      sessionKey: route.mainSessionKey,
+      sessionKey: route.sessionKey,
       deliveryContext: {
         channel: "line",
         to: userId ?? peerId,
diff --git a/src/signal/monitor/event-handler.ts b/src/signal/monitor/event-handler.ts
index 72195ff78..eb45e1dd2 100644
--- a/src/signal/monitor/event-handler.ts
+++ b/src/signal/monitor/event-handler.ts
@@ -156,7 +156,7 @@ export function createSignalEventHandler(deps: SignalEventHandlerDeps) {
       ctx: ctxPayload,
       updateLastRoute: !entry.isGroup
         ? {
-            sessionKey: route.mainSessionKey,
+            sessionKey: route.sessionKey,
             channel: "signal",
             to: entry.senderRecipient,
             accountId: route.accountId,
diff --git a/src/slack/monitor/message-handler/dispatch.ts b/src/slack/monitor/message-handler/dispatch.ts
index 38b69f049..a0c819638 100644
--- a/src/slack/monitor/message-handler/dispatch.ts
+++ b/src/slack/monitor/message-handler/dispatch.ts
@@ -27,7 +27,7 @@ export async function dispatchPreparedSlackMessage(prepared: PreparedSlackMessag
     });
     await updateLastRoute({
       storePath,
-      sessionKey: route.mainSessionKey,
+      sessionKey: route.sessionKey,
       deliveryContext: {
         channel: "slack",
         to: `user:${message.user}`,
diff --git a/src/slack/monitor/message-handler/prepare.ts b/src/slack/monitor/message-handler/prepare.ts
index 8a2a9e111..02fc19cae 100644
--- a/src/slack/monitor/message-handler/prepare.ts
+++ b/src/slack/monitor/message-handler/prepare.ts
@@ -533,7 +533,7 @@ export async function prepareSlackMessage(params: {
     ctx: ctxPayload,
     updateLastRoute: isDirectMessage
       ? {
-          sessionKey: route.mainSessionKey,
+          sessionKey: route.sessionKey,
           channel: "slack",
           to: `user:${message.user}`,
           accountId: route.accountId,
diff --git a/src/telegram/bot-message-context.ts b/src/telegram/bot-message-context.ts
index 9696e4f1b..41188df50 100644
--- a/src/telegram/bot-message-context.ts
+++ b/src/telegram/bot-message-context.ts
@@ -617,7 +617,7 @@ export const buildTelegramMessageContext = async ({
     ctx: ctxPayload,
     updateLastRoute: !isGroup
       ? {
-          sessionKey: route.mainSessionKey,
+          sessionKey: route.sessionKey,
           channel: "telegram",
           to: String(chatId),
           accountId: route.accountId,
diff --git a/src/web/auto-reply/monitor/process-message.ts b/src/web/auto-reply/monitor/process-message.ts
index 27b638cfb..af8feaa05 100644
--- a/src/web/auto-reply/monitor/process-message.ts
+++ b/src/web/auto-reply/monitor/process-message.ts
@@ -295,7 +295,7 @@ export async function processMessage(params: {
       cfg: params.cfg,
       backgroundTasks: params.backgroundTasks,
       storeAgentId: params.route.agentId,
-      sessionKey: params.route.mainSessionKey,
+      sessionKey: params.route.sessionKey,
       channel: "whatsapp",
       to: dmRouteTarget,
       accountId: params.route.accountId,