diff --git a/src/libs/Middleware/HandleUnusedOptimisticID.ts b/src/libs/Middleware/HandleUnusedOptimisticID.ts
index 8fa00e7be47a..c6b4ac7d7b6f 100644
--- a/src/libs/Middleware/HandleUnusedOptimisticID.ts
+++ b/src/libs/Middleware/HandleUnusedOptimisticID.ts
@@ -16,18 +16,6 @@ import type {OnyxEntry} from 'react-native-onyx';
 import clone from 'lodash/clone';
 import Onyx from 'react-native-onyx';
 
-/**
- * Use this only in non-React contexts (e.g. request middleware) where `useOnyx` is not available;
- * React code should read the list via `useOnyx(ONYXKEYS.PERSONAL_DETAILS_LIST)` and pass it down.
- */
-let allPersonalDetails: OnyxEntry<PersonalDetailsList>;
-Onyx.connectWithoutView({
-    key: ONYXKEYS.PERSONAL_DETAILS_LIST,
-    callback: (value) => {
-        allPersonalDetails = value;
-    },
-});
-
 // Local cache of reportID to optimistic Onyx data
 const reportOptimisticData = new Map<string, {settledPersonalDetails: OnyxEntry<PersonalDetailsList>; redundantParticipants: Record<number, null>} | undefined>();
 
@@ -49,7 +37,7 @@ const handleUnusedOptimisticID: Middleware = (requestResponse, request, isFromSe
             // We're opening a new report, which can be a new or preexisting report
             // For new report, clean up optimistic data after this request returned successfully
             // For report redirect a preexisting report, clean up optimistic data after the request of preexisting report returned successfully
-            reportOptimisticData.set(currentRequestReportID, prepareOnyxDataForCleanUpOptimisticParticipants(currentRequestReportID, allPersonalDetails));
+            reportOptimisticData.set(currentRequestReportID, prepareOnyxDataForCleanUpOptimisticParticipants(currentRequestReportID));
         }
 
         const responseOnyxData = response?.onyxData ?? [];
diff --git a/src/libs/actions/Report/index.ts b/src/libs/actions/Report/index.ts
index 9b72f3cf5500..c4a286274a13 100644
--- a/src/libs/actions/Report/index.ts
+++ b/src/libs/actions/Report/index.ts
@@ -2098,7 +2098,6 @@ function createGroupChat(
 
 function prepareOnyxDataForCleanUpOptimisticParticipants(
     reportID: string,
-    personalDetails: OnyxEntry<PersonalDetailsList>,
 ): {settledPersonalDetails: OnyxEntry<PersonalDetailsList>; redundantParticipants: Record<number, null>} | undefined {
     const existingReport = allReports?.[`${ONYXKEYS.COLLECTION.REPORT}${reportID}`];
     if (!existingReport?.participants) {
@@ -2107,7 +2106,7 @@ function prepareOnyxDataForCleanUpOptimisticParticipants(
     const settledPersonalDetails: OnyxEntry<PersonalDetailsList> = {};
     const redundantParticipants: Record<number, null> = {};
     for (const accountID in existingReport.participants) {
-        if (!personalDetails?.[accountID]?.isOptimisticPersonalDetail) {
+        if (!allPersonalDetails?.[accountID]?.isOptimisticPersonalDetail) {
             continue;
         }
         settledPersonalDetails[accountID] = null;
@@ -2228,7 +2227,8 @@ function createTransactionThreadReport(params: CreateTransactionThreadReportPara
         reportID: optimisticTransactionThreadReportID,
         introSelected,
         participants,
-        personalDetails,
+        // TODO: allPersonalDetails fallback should be removed in follow-up PRs https://github.com/Expensify/App/issues/73656
+        personalDetails: personalDetails ?? allPersonalDetails,
         newReportObject: optimisticTransactionThread,
         parentReportActionID: iouReportAction?.reportActionID,
         transaction,
@@ -3961,7 +3961,18 @@ function navigateToConciergeChat(
             if (!checkIfCurrentPageActive()) {
                 return;
             }
-            navigateToAndOpenReport([CONST.EMAIL.CONCIERGE], personalDetails, currentUserAccountID, introSelected, isSelfTourViewed, betas, shouldDismissModal, false, linkToOptions);
+            // TODO: allPersonalDetails fallback should be removed in follow-up PRs https://github.com/Expensify/App/issues/73656
+            navigateToAndOpenReport(
+                [CONST.EMAIL.CONCIERGE],
+                personalDetails ?? allPersonalDetails,
+                currentUserAccountID,
+                introSelected,
+                isSelfTourViewed,
+                betas,
+                shouldDismissModal,
+                false,
+                linkToOptions,
+            );
         });
     } else if (shouldDismissModal) {
         const reportParams = {reportID: conciergeReportID, reportActionID};
diff --git a/tests/actions/ReportTest.ts b/tests/actions/ReportTest.ts
index 2ed6d5702cb0..0236a0a39a0f 100644
--- a/tests/actions/ReportTest.ts
+++ b/tests/actions/ReportTest.ts
@@ -9009,65 +9009,4 @@ describe('actions/Report', () => {
             expect(result.delegateAccountID).toBeUndefined();
         });
     });
-
-    describe('prepareOnyxDataForCleanUpOptimisticParticipants', () => {
-        const REPORT_ID = '1';
-        const OPTIMISTIC_ACCOUNT_ID = 100;
-        const SETTLED_ACCOUNT_ID = 200;
-
-        it('marks only participants with optimistic personal details for clean up', async () => {
-            // Given a report with one optimistic and one settled participant
-            await Onyx.set(`${ONYXKEYS.COLLECTION.REPORT}${REPORT_ID}`, {
-                reportID: REPORT_ID,
-                participants: {
-                    [OPTIMISTIC_ACCOUNT_ID]: {notificationPreference: CONST.REPORT.NOTIFICATION_PREFERENCE.ALWAYS},
-                    [SETTLED_ACCOUNT_ID]: {notificationPreference: CONST.REPORT.NOTIFICATION_PREFERENCE.ALWAYS},
-                },
-            });
-            await waitForBatchedUpdates();
-
-            // When preparing the clean up data using the provided personal details
-            const result = Report.prepareOnyxDataForCleanUpOptimisticParticipants(REPORT_ID, {
-                [OPTIMISTIC_ACCOUNT_ID]: {accountID: OPTIMISTIC_ACCOUNT_ID, isOptimisticPersonalDetail: true},
-                [SETTLED_ACCOUNT_ID]: {accountID: SETTLED_ACCOUNT_ID},
-            });
-
-            // Then only the optimistic participant is marked for clean up
-            expect(result).toEqual({
-                settledPersonalDetails: {[OPTIMISTIC_ACCOUNT_ID]: null},
-                redundantParticipants: {[OPTIMISTIC_ACCOUNT_ID]: null},
-            });
-        });
-
-        it('returns empty clean up data when no participant has optimistic personal details', async () => {
-            await Onyx.set(`${ONYXKEYS.COLLECTION.REPORT}${REPORT_ID}`, {
-                reportID: REPORT_ID,
-                participants: {[SETTLED_ACCOUNT_ID]: {notificationPreference: CONST.REPORT.NOTIFICATION_PREFERENCE.ALWAYS}},
-            });
-            await waitForBatchedUpdates();
-
-            const result = Report.prepareOnyxDataForCleanUpOptimisticParticipants(REPORT_ID, {[SETTLED_ACCOUNT_ID]: {accountID: SETTLED_ACCOUNT_ID}});
-
-            expect(result).toEqual({settledPersonalDetails: {}, redundantParticipants: {}});
-        });
-
-        it('returns undefined when the report has no participants', async () => {
-            await Onyx.set(`${ONYXKEYS.COLLECTION.REPORT}${REPORT_ID}`, {reportID: REPORT_ID});
-            await waitForBatchedUpdates();
-
-            const result = Report.prepareOnyxDataForCleanUpOptimisticParticipants(REPORT_ID, {
-                [OPTIMISTIC_ACCOUNT_ID]: {accountID: OPTIMISTIC_ACCOUNT_ID, isOptimisticPersonalDetail: true},
-            });
-
-            expect(result).toBeUndefined();
-        });
-
-        it('returns undefined when the report does not exist', () => {
-            const result = Report.prepareOnyxDataForCleanUpOptimisticParticipants('non-existent-report', {
-                [OPTIMISTIC_ACCOUNT_ID]: {accountID: OPTIMISTIC_ACCOUNT_ID, isOptimisticPersonalDetail: true},
-            });
-
-            expect(result).toBeUndefined();
-        });
-    });
 });