diff --git a/src/libs/SidebarUtils.ts b/src/libs/SidebarUtils.ts
index 989d480bbc4e..e7a78fb0a230 100644
--- a/src/libs/SidebarUtils.ts
+++ b/src/libs/SidebarUtils.ts
@@ -725,7 +725,10 @@ function getOptionData({
     // Assign the actor account ID from the last action when it’s a REPORT_PREVIEW action.
     // to ensures that lastActorDetails.accountID is correctly set in case it's empty string
     if (lastAction?.actionName === CONST.REPORT.ACTIONS.TYPE.REPORT_PREVIEW && lastActorDetails) {
-        lastActorDetails.accountID = lastAction.actorAccountID;
+        lastActorDetails = {
+            ...lastActorDetails,
+            accountID: lastAction.actorAccountID,
+        };
     }
 
     const lastActorDisplayName = getLastActorDisplayName(lastActorDetails);
diff --git a/tests/ui/LHNItemsPresence.tsx b/tests/ui/LHNItemsPresence.tsx
index 9cb081824d9e..daa3a0251b7b 100644
--- a/tests/ui/LHNItemsPresence.tsx
+++ b/tests/ui/LHNItemsPresence.tsx
@@ -16,6 +16,8 @@ import ONYXKEYS from '@src/ONYXKEYS';
 import type {PersonalDetailsList, Report, ReportAction, ViolationName} from '@src/types/onyx';
 import type {ReportCollectionDataSet} from '@src/types/onyx/Report';
 import {chatReportR14932} from '../../__mocks__/reportData/reports';
+import createRandomReportAction from '../utils/collections/reportActions';
+import getOnyxValue from '../utils/getOnyxValue';
 import * as LHNTestUtils from '../utils/LHNTestUtils';
 import * as TestHelper from '../utils/TestHelper';
 import waitForBatchedUpdates from '../utils/waitForBatchedUpdates';
@@ -407,6 +409,45 @@ describe('SidebarLinksData', () => {
             // Then the report should not disappear in the sidebar because we are in the focus mode
             expect(getOptionRows()).toHaveLength(0);
         });
+
+        it('should not change the current user personal detail when a report with last action is REPORTPREVIEW is displayed', async () => {
+            // Given the SidebarLinks are rendered.
+            LHNTestUtils.getDefaultRenderedSidebarLinks();
+
+            const report: Report = {
+                ...createReport(undefined, [1, 2], undefined, undefined, undefined, true),
+                lastActorAccountID: 1,
+                lastMessageText: '123456',
+            };
+
+            const lastReportAction: ReportAction = {
+                ...createRandomReportAction(2),
+                actionName: 'REPORTPREVIEW',
+                actorAccountID: 2,
+                message: [],
+                originalMessage: undefined,
+                person: [
+                    {
+                        type: 'TEXT',
+                        style: 'strong',
+                        text: TEST_USER_LOGIN,
+                    },
+                ],
+            };
+
+            await initializeState({
+                [`${ONYXKEYS.COLLECTION.REPORT}${report.reportID}`]: report,
+            });
+
+            await waitForBatchedUpdatesWithAct();
+
+            await Onyx.set(`${ONYXKEYS.COLLECTION.REPORT_ACTIONS}${report.reportID}`, {[lastReportAction.reportActionID]: lastReportAction});
+
+            await waitForBatchedUpdatesWithAct();
+
+            const personalDetail = await getOnyxValue(ONYXKEYS.PERSONAL_DETAILS_LIST);
+            expect(personalDetail?.[TEST_USER_ACCOUNT_ID]?.accountID).toBe(TEST_USER_ACCOUNT_ID);
+        });
     });
 
     describe('Report that should NOT be included in the LHN', () => {