diff --git a/helpers/lotOccupancyDB/addWorkOrderMilestone.d.ts b/helpers/lotOccupancyDB/addWorkOrderMilestone.d.ts
index 5dd2c3b0..8c1808df 100644
--- a/helpers/lotOccupancyDB/addWorkOrderMilestone.d.ts
+++ b/helpers/lotOccupancyDB/addWorkOrderMilestone.d.ts
@@ -1,7 +1,7 @@
 import type * as recordTypes from '../../types/recordTypes';
 interface AddWorkOrderMilestoneForm {
     workOrderId: string | number;
-    workOrderMilestoneTypeId?: number | string;
+    workOrderMilestoneTypeId: number | string;
     workOrderMilestoneDateString: string;
     workOrderMilestoneTimeString?: string;
     workOrderMilestoneDescription: string;
diff --git a/helpers/lotOccupancyDB/addWorkOrderMilestone.js b/helpers/lotOccupancyDB/addWorkOrderMilestone.js
index e32ed065..5ed2c8bb 100644
--- a/helpers/lotOccupancyDB/addWorkOrderMilestone.js
+++ b/helpers/lotOccupancyDB/addWorkOrderMilestone.js
@@ -12,7 +12,7 @@ export async function addWorkOrderMilestone(milestoneForm, requestSession) {
         recordCreate_userName, recordCreate_timeMillis,
         recordUpdate_userName, recordUpdate_timeMillis)
         values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`)
-        .run(milestoneForm.workOrderId, milestoneForm.workOrderMilestoneTypeId ?? undefined, milestoneForm.workOrderMilestoneDateString === ''
+        .run(milestoneForm.workOrderId, milestoneForm.workOrderMilestoneTypeId === '' ? undefined : milestoneForm.workOrderMilestoneTypeId, milestoneForm.workOrderMilestoneDateString === ''
         ? 0
         : dateStringToInteger(milestoneForm.workOrderMilestoneDateString), milestoneForm.workOrderMilestoneTimeString
         ? timeStringToInteger(milestoneForm.workOrderMilestoneTimeString)
diff --git a/helpers/lotOccupancyDB/addWorkOrderMilestone.ts b/helpers/lotOccupancyDB/addWorkOrderMilestone.ts
index ba388889..d7b44bb3 100644
--- a/helpers/lotOccupancyDB/addWorkOrderMilestone.ts
+++ b/helpers/lotOccupancyDB/addWorkOrderMilestone.ts
@@ -11,7 +11,7 @@ import type * as recordTypes from '../../types/recordTypes'
 
 interface AddWorkOrderMilestoneForm {
   workOrderId: string | number
-  workOrderMilestoneTypeId?: number | string
+  workOrderMilestoneTypeId: number | string
   workOrderMilestoneDateString: string
   workOrderMilestoneTimeString?: string
   workOrderMilestoneDescription: string
@@ -40,7 +40,7 @@ export async function addWorkOrderMilestone(
     )
     .run(
       milestoneForm.workOrderId,
-      milestoneForm.workOrderMilestoneTypeId ?? undefined,
+      milestoneForm.workOrderMilestoneTypeId === '' ? undefined : milestoneForm.workOrderMilestoneTypeId,
       milestoneForm.workOrderMilestoneDateString === ''
         ? 0
         : dateStringToInteger(milestoneForm.workOrderMilestoneDateString),