diff --git a/packages/twenty-front/src/modules/object-record/object-options-dropdown/hooks/useExportProcessRecordsForCSV.ts b/packages/twenty-front/src/modules/object-record/object-options-dropdown/hooks/useExportProcessRecordsForCSV.ts
index 817d6ea9107..319e1f1d592 100644
--- a/packages/twenty-front/src/modules/object-record/object-options-dropdown/hooks/useExportProcessRecordsForCSV.ts
+++ b/packages/twenty-front/src/modules/object-record/object-options-dropdown/hooks/useExportProcessRecordsForCSV.ts
@@ -1,5 +1,6 @@
 import { useObjectMetadataItem } from '@/object-metadata/hooks/useObjectMetadataItem';
 import { type FieldCurrencyValue } from '@/object-record/record-field/ui/types/FieldMetadata';
+import { isFieldCurrencyValue } from '@/object-record/record-field/ui/types/guards/isFieldCurrencyValue';
 import { type ObjectRecord } from '@/object-record/types/ObjectRecord';
 import { isDefined } from 'twenty-shared/utils';
 import { FieldMetadataType } from '~/generated-metadata/graphql';
@@ -19,16 +20,24 @@ export const useExportProcessRecordsForCSV = (objectNameSingular: string) => {
           }
 
           switch (field.type) {
-            case FieldMetadataType.CURRENCY:
+            case FieldMetadataType.CURRENCY: {
+              const currencyValue = record[field.name];
+              if (!isFieldCurrencyValue(currencyValue)) {
+                return processedRecord;
+              }
               return {
                 ...processedRecord,
                 [field.name]: {
-                  amountMicros: convertCurrencyMicrosToCurrencyAmount(
-                    record[field.name].amountMicros,
-                  ),
-                  currencyCode: record[field.name].currencyCode,
+                  amountMicros:
+                    currencyValue.amountMicros !== null
+                      ? convertCurrencyMicrosToCurrencyAmount(
+                          currencyValue.amountMicros,
+                        )
+                      : null,
+                  currencyCode: currencyValue.currencyCode,
                 } satisfies FieldCurrencyValue,
               };
+            }
             case FieldMetadataType.MULTI_SELECT:
             case FieldMetadataType.ARRAY:
             case FieldMetadataType.RAW_JSON:
diff --git a/packages/twenty-front/src/modules/ui/field/display/components/PhonesDisplay.tsx b/packages/twenty-front/src/modules/ui/field/display/components/PhonesDisplay.tsx
index 4148cdb4694..ebf6fa67435 100644
--- a/packages/twenty-front/src/modules/ui/field/display/components/PhonesDisplay.tsx
+++ b/packages/twenty-front/src/modules/ui/field/display/components/PhonesDisplay.tsx
@@ -116,18 +116,20 @@ export const PhonesDisplay = ({
   );
 };
 
-const parseAdditionalPhones = (additionalPhones?: any) => {
+const parseAdditionalPhones = (additionalPhones?: unknown) => {
   if (!additionalPhones) {
     return [];
   }
 
-  if (typeof additionalPhones === 'object') {
+  if (Array.isArray(additionalPhones)) {
     return additionalPhones;
   }
 
   if (typeof additionalPhones === 'string') {
     try {
-      return JSON.parse(additionalPhones);
+      const parsed = JSON.parse(additionalPhones);
+
+      return Array.isArray(parsed) ? parsed : [];
     } catch (error) {
       logError(t`Error parsing additional phones: ${error}`);
     }
diff --git a/packages/twenty-server/src/engine/core-modules/record-transformer/utils/transform-emails-value.util.ts b/packages/twenty-server/src/engine/core-modules/record-transformer/utils/transform-emails-value.util.ts
index 461572d5d84..79422176e14 100644
--- a/packages/twenty-server/src/engine/core-modules/record-transformer/utils/transform-emails-value.util.ts
+++ b/packages/twenty-server/src/engine/core-modules/record-transformer/utils/transform-emails-value.util.ts
@@ -17,14 +17,12 @@ export const transformEmailsValue = (
 
   if (additionalEmails) {
     try {
-      const emailArray = (
-        isNonEmptyString(additionalEmails)
-          ? JSON.parse(additionalEmails)
-          : additionalEmails
-      ) as string[];
+      const emailArray = isNonEmptyString(additionalEmails)
+        ? JSON.parse(additionalEmails)
+        : additionalEmails;
 
       additionalEmails = isNonEmptyArray(emailArray)
-        ? JSON.stringify(emailArray.map((email) => email.toLowerCase()))
+        ? JSON.stringify(emailArray.map((email: string) => email.toLowerCase()))
         : null;
     } catch {
       /* empty */
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-participant-manager/listeners/calendar-event-participant-person.listener.ts b/packages/twenty-server/src/modules/calendar/calendar-event-participant-manager/listeners/calendar-event-participant-person.listener.ts
index 07005788658..56a5b24e247 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-participant-manager/listeners/calendar-event-participant-person.listener.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-participant-manager/listeners/calendar-event-participant-person.listener.ts
@@ -45,8 +45,7 @@ export class CalendarEventParticipantPersonListener {
     const personEmails = personWithEmails
       .flatMap((eventPayload) => [
         eventPayload.properties.after.emails.primaryEmail,
-        ...((eventPayload.properties.after.emails?.additionalEmails ??
-          []) as string[]),
+        ...(eventPayload.properties.after.emails?.additionalEmails ?? []),
       ])
       .filter(isDefined);
 
@@ -82,8 +81,7 @@ export class CalendarEventParticipantPersonListener {
     const personEmails = personWithEmails
       .flatMap((eventPayload) => [
         eventPayload.properties.after.emails.primaryEmail,
-        ...((eventPayload.properties.after.emails?.additionalEmails ??
-          []) as string[]),
+        ...(eventPayload.properties.after.emails?.additionalEmails ?? []),
       ])
       .filter(isDefined);
 
@@ -115,8 +113,7 @@ export class CalendarEventParticipantPersonListener {
     const personEmails = peopleHavingEmails
       .flatMap((eventPayload) => [
         eventPayload.properties.before.emails.primaryEmail,
-        ...((eventPayload.properties.before.emails?.additionalEmails ??
-          []) as string[]),
+        ...(eventPayload.properties.before.emails?.additionalEmails ?? []),
       ])
       .filter(isDefined);
 
diff --git a/packages/twenty-server/src/modules/contact-creation-manager/services/create-company-and-contact.service.ts b/packages/twenty-server/src/modules/contact-creation-manager/services/create-company-and-contact.service.ts
index 3dd2fd89bcd..d7be0d92b6a 100644
--- a/packages/twenty-server/src/modules/contact-creation-manager/services/create-company-and-contact.service.ts
+++ b/packages/twenty-server/src/modules/contact-creation-manager/services/create-company-and-contact.service.ts
@@ -8,7 +8,7 @@ import {
   ConnectedAccountProvider,
   type FieldActorSource,
 } from 'twenty-shared/types';
-import { isDefined } from 'twenty-shared/utils';
+import { isDefined, isNonEmptyArray } from 'twenty-shared/utils';
 import { type DeepPartial, type Repository } from 'typeorm';
 import { v4 } from 'uuid';
 
@@ -251,7 +251,7 @@ export class CreateCompanyAndPersonService {
       const existingPersonOnAdditionalEmails = alreadyCreatedPeople.find(
         (person) => {
           return (
-            Array.isArray(person.emails?.additionalEmails) &&
+            isNonEmptyArray(person.emails?.additionalEmails) &&
             person.emails.additionalEmails.some(
               (email) => email.toLowerCase() === contact.handle.toLowerCase(),
             )
diff --git a/packages/twenty-server/src/modules/contact-creation-manager/utils/compute-changed-additional-emails.ts b/packages/twenty-server/src/modules/contact-creation-manager/utils/compute-changed-additional-emails.ts
index 83728d48ba0..3f5fe446c03 100644
--- a/packages/twenty-server/src/modules/contact-creation-manager/utils/compute-changed-additional-emails.ts
+++ b/packages/twenty-server/src/modules/contact-creation-manager/utils/compute-changed-additional-emails.ts
@@ -5,8 +5,8 @@ import { type PersonWorkspaceEntity } from 'src/modules/person/standard-objects/
 export const computeChangedAdditionalEmails = (
   diff: Partial<ObjectRecordDiff<PersonWorkspaceEntity>>,
 ) => {
-  const before = diff.emails?.before?.additionalEmails as string[];
-  const after = diff.emails?.after?.additionalEmails as string[];
+  const before = diff.emails?.before?.additionalEmails;
+  const after = diff.emails?.after?.additionalEmails;
 
   if (!Array.isArray(before) || !Array.isArray(after)) {
     return {
diff --git a/packages/twenty-server/src/modules/match-participant/utils/find-person-by-primary-or-additional-email.ts b/packages/twenty-server/src/modules/match-participant/utils/find-person-by-primary-or-additional-email.ts
index 2b203c28e05..285962dd8d5 100644
--- a/packages/twenty-server/src/modules/match-participant/utils/find-person-by-primary-or-additional-email.ts
+++ b/packages/twenty-server/src/modules/match-participant/utils/find-person-by-primary-or-additional-email.ts
@@ -1,3 +1,5 @@
+import { isNonEmptyArray } from 'twenty-shared/utils';
+
 import { type PersonWorkspaceEntity } from 'src/modules/person/standard-objects/person.workspace-entity';
 
 export const findPersonByPrimaryOrAdditionalEmail = ({
@@ -20,7 +22,7 @@ export const findPersonByPrimaryOrAdditionalEmail = ({
   const personWithAdditionalEmail = people.find((person) => {
     const additionalEmails = person.emails?.additionalEmails;
 
-    if (!Array.isArray(additionalEmails)) {
+    if (!isNonEmptyArray(additionalEmails)) {
       return false;
     }
 
diff --git a/packages/twenty-server/src/modules/messaging/message-participant-manager/listeners/message-participant-person.listener.ts b/packages/twenty-server/src/modules/messaging/message-participant-manager/listeners/message-participant-person.listener.ts
index fcf8676a603..a60df0c4a9e 100644
--- a/packages/twenty-server/src/modules/messaging/message-participant-manager/listeners/message-participant-person.listener.ts
+++ b/packages/twenty-server/src/modules/messaging/message-participant-manager/listeners/message-participant-person.listener.ts
@@ -45,8 +45,7 @@ export class MessageParticipantPersonListener {
     const personEmails = personWithEmails
       .flatMap((eventPayload) => [
         eventPayload.properties.after.emails.primaryEmail,
-        ...((eventPayload.properties.after.emails?.additionalEmails ??
-          []) as string[]),
+        ...(eventPayload.properties.after.emails?.additionalEmails ?? []),
       ])
       .filter(isDefined);
 
@@ -82,8 +81,7 @@ export class MessageParticipantPersonListener {
     const personEmails = personWithEmails
       .flatMap((eventPayload) => [
         eventPayload.properties.after.emails.primaryEmail,
-        ...((eventPayload.properties.after.emails?.additionalEmails ??
-          []) as string[]),
+        ...(eventPayload.properties.after.emails?.additionalEmails ?? []),
       ])
       .filter(isDefined);
 
@@ -121,8 +119,8 @@ export class MessageParticipantPersonListener {
           personEmails: personWithEmails
             .flatMap((eventPayload) => [
               eventPayload.properties.before.emails.primaryEmail,
-              ...((eventPayload.properties.before.emails?.additionalEmails ??
-                []) as string[]),
+              ...(eventPayload.properties.before.emails?.additionalEmails ??
+                []),
             ])
             .filter(isDefined),
           workspaceMemberIds: [],