diff --git a/models/tracker/src/migration.ts b/models/tracker/src/migration.ts
index ac2f219eaac..d07660e56c6 100644
--- a/models/tracker/src/migration.ts
+++ b/models/tracker/src/migration.ts
@@ -200,10 +200,12 @@ async function migrateDefaultStatuses (client: MigrationClient, logger: ModelLog
     // 1. defaultIssueStatus
     // 2. DocUpdateMessage:update:defaultIssueStatus
     for (const project of projects) {
-      const newDefaultIssueStatus = getNewStatus(project.defaultIssueStatus)
+      if (project.defaultIssueStatus != null) {
+        const newDefaultIssueStatus = getNewStatus(project.defaultIssueStatus)
 
-      if (project.defaultIssueStatus !== newDefaultIssueStatus) {
-        await client.update(DOMAIN_SPACE, { _id: project._id }, { defaultIssueStatus: newDefaultIssueStatus })
+        if (project.defaultIssueStatus !== newDefaultIssueStatus) {
+          await client.update(DOMAIN_SPACE, { _id: project._id }, { defaultIssueStatus: newDefaultIssueStatus })
+        }
       }
 
       const projectUpdateMessages = await client.find<DocUpdateMessage>(DOMAIN_ACTIVITY, {
diff --git a/models/tracker/src/types.ts b/models/tracker/src/types.ts
index cb6dbb7786e..09d3421f302 100644
--- a/models/tracker/src/types.ts
+++ b/models/tracker/src/types.ts
@@ -126,7 +126,7 @@ export class TProject extends TTaskProject implements Project {
     sequence!: number
 
   @Prop(TypeRef(tracker.class.IssueStatus), tracker.string.DefaultIssueStatus)
-    defaultIssueStatus!: Ref<IssueStatus>
+    defaultIssueStatus?: Ref<IssueStatus>
 
   @Prop(TypeRef(contact.mixin.Employee), tracker.string.DefaultAssignee)
     defaultAssignee!: Ref<Employee>
diff --git a/plugins/tracker/src/index.ts b/plugins/tracker/src/index.ts
index f90a75abf32..bc1cba1152c 100644
--- a/plugins/tracker/src/index.ts
+++ b/plugins/tracker/src/index.ts
@@ -61,7 +61,7 @@ export interface IssueStatus extends Status {}
 export interface Project extends TaskProject, IconProps {
   identifier: string // Project identifier
   sequence: number
-  defaultIssueStatus: Ref<IssueStatus>
+  defaultIssueStatus?: Ref<IssueStatus>
   defaultAssignee?: Ref<Employee>
   defaultTimeReportDay: TimeReportDayType
 }