diff --git a/CDC_Backend/APIs/constants.py b/CDC_Backend/APIs/constants.py
index 5981cba..d4af488 100644
--- a/CDC_Backend/APIs/constants.py
+++ b/CDC_Backend/APIs/constants.py
@@ -138,12 +138,14 @@ SPECIAL_FORMAT_IN_PDF = ['website', 'company_details_pdf_names', 'description_pd
 COMPANY_OPENING_SUBMITTED_TEMPLATE_SUBJECT = "Notification Submitted - {id} - Career Development Cell, IIT Dharwad"
 STUDENT_APPLICATION_STATUS_TEMPLATE_SUBJECT = 'Application Status : {company_name} - {id}'
 STUDENT_APPLICATION_SUBMITTED_TEMPLATE_SUBJECT = 'CDC - Application Submitted - {company_name}'
+STUDENT_APPLICATION_UPDATED_TEMPLATE_SUBJECT = 'CDC - Application Updated - {company_name}'
 COMPANY_EMAIl_VERIFICATION_TEMPLATE_SUBJECT = 'Email Verification - Career Development Cell, IIT Dharwad'
 
 STUDENT_APPLICATION_SUBMITTED_TEMPLATE = 'student_application_submitted.html'
 COMPANY_OPENING_SUBMITTED_TEMPLATE = 'company_opening_submitted.html'
 STUDENT_APPLICATION_STATUS_SELECTED_TEMPLATE = 'student_application_status_selected.html'
 STUDENT_APPLICATION_STATUS_NOT_SELECTED_TEMPLATE = 'student_application_status_not_selected.html'
+STUDENT_APPLICATION_UPDATED_TEMPLATE = 'student_application_updated.html'
 COMPANY_EMAIL_VERIFICATION_TEMPLATE = 'company_email_verification.html'
 COMPANY_JNF_RESPONSE_TEMPLATE = 'company_jnf_response.html'
 
diff --git a/CDC_Backend/APIs/models.py b/CDC_Backend/APIs/models.py
index b986089..2aaa1b3 100644
--- a/CDC_Backend/APIs/models.py
+++ b/CDC_Backend/APIs/models.py
@@ -9,8 +9,8 @@ from .constants import *
 
 
 class User(models.Model):
-    email = models.EmailField(primary_key=True, blank=False, max_length=JNF_TEXT_MAX_CHARACTER_COUNT)
-    id = models.CharField(blank=False, max_length=25)
+    email = models.EmailField(blank=False, max_length=JNF_TEXT_MAX_CHARACTER_COUNT, unique=True)
+    id = models.CharField(blank=False, max_length=25, index=True, unique=True)
     user_type = ArrayField(models.CharField(blank=False, max_length=10), size=4, default=list, blank=False)
     last_login_time = models.DateTimeField(default=timezone.now)
 
diff --git a/CDC_Backend/templates/student_updated_applications.html b/CDC_Backend/templates/student_application_updated.html
similarity index 100%
rename from CDC_Backend/templates/student_updated_applications.html
rename to CDC_Backend/templates/student_application_updated.html