diff --git a/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.html b/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.html
index eb2b33bdc..5d2809aec 100644
--- a/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.html
+++ b/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.html
@@ -1,5 +1,5 @@
 <form [formGroup]="form">
-    <div class="iqser-input-group w-300">
+    <div class="iqser-input-group w-300 required">
         <mat-form-field floatLabel="always">
             <mat-label>{{ 'assign-dossier-owner.dialog.single-user' | translate }}</mat-label>
             <mat-select formControlName="owner">
diff --git a/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.ts b/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.ts
index 391c6493e..9f92db656 100644
--- a/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.ts
+++ b/apps/red-ui/src/app/modules/dossier/dialogs/edit-dossier-dialog/edit-dossier-team/edit-dossier-team.component.ts
@@ -1,6 +1,6 @@
 import { ChangeDetectionStrategy, Component, Input, OnDestroy, OnInit } from '@angular/core';
 import { UserService } from '@services/user.service';
-import { FormBuilder, FormGroup } from '@angular/forms';
+import { FormBuilder, FormGroup, Validators } from '@angular/forms';
 import { DossiersService } from '@services/entity-services/dossiers.service';
 import { Dossier, IDossierRequest } from '@red/domain';
 import { AutoUnsubscribe } from '@iqser/common-ui';
@@ -146,10 +146,13 @@ export class EditDossierTeamComponent extends AutoUnsubscribe implements EditDos
 
     private _loadData() {
         this.form = this._formBuilder.group({
-            owner: {
-                value: this.dossier?.ownerId,
-                disabled: this.disabled,
-            },
+            owner: [
+                {
+                    value: this.dossier?.ownerId,
+                    disabled: this.disabled,
+                },
+                Validators.required,
+            ],
             approvers: [[...this.dossier?.approverIds]],
             members: [[...this.dossier?.memberIds]],
         });
diff --git a/libs/common-ui b/libs/common-ui
index 95644f59e..f4e044521 160000
--- a/libs/common-ui
+++ b/libs/common-ui
@@ -1 +1 @@
-Subproject commit 95644f59e4e32517d76e0bd9267805a88ebdd8d1
+Subproject commit f4e0445212824788d10cd81adc0bce484a8dbb02