diff --git a/server/website/website/migrations/0001_initial.py b/server/website/website/migrations/0001_initial.py
index 3694725..a392551 100644
--- a/server/website/website/migrations/0001_initial.py
+++ b/server/website/website/migrations/0001_initial.py
@@ -191,7 +191,7 @@ class Migration(migrations.Migration):
                 ('creation_time', models.DateTimeField()),
                 ('last_update', models.DateTimeField()),
                 ('upload_code', models.CharField(max_length=30, unique=True)),
-                ('tuning_session', models.CharField(choices=[('tuning_sesion', 'Tuning Session'), ('no_tuning_session', 'No Tuning'), ('randomly_generate', 'Randomly Generate')], max_length=64)),
+                ('tuning_session', models.CharField(choices=[('tuning_session', 'Tuning Session'), ('no_tuning_session', 'No Tuning'), ('randomly_generate', 'Randomly Generate')], max_length=64)),
                 ('target_objective', models.CharField(choices=[(b'throughput_txn_per_sec', b'Throughput'), (b'99th_lat_ms', b'99 Percentile Latency')], max_length=64, null=True)),
                 ('nondefault_settings', models.TextField(null=True)),
                 ('dbms', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='website.DBMSCatalog')),
diff --git a/server/website/website/migrations/0005_adding_session_knob.py b/server/website/website/migrations/0005_adding_session_knob.py
index 102249b..f2e5c9b 100644
--- a/server/website/website/migrations/0005_adding_session_knob.py
+++ b/server/website/website/migrations/0005_adding_session_knob.py
@@ -118,7 +118,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='session',
             name='tuning_session',
-            field=models.CharField(choices=[('tuning_session', 'Tuning Session'), ('no_tuning_session', 'No Tuning'), ('randomly_generate', 'Randomly Generate')], default='tuning_sesion', max_length=64),
+            field=models.CharField(choices=[('tuning_session', 'Tuning Session'), ('no_tuning_session', 'No Tuning'), ('randomly_generate', 'Randomly Generate')], default='tuning_session', max_length=64),
         ),
         migrations.AlterField(
             model_name='workload',
diff --git a/server/website/website/models.py b/server/website/website/models.py
index 5b83a3a..7ff49d9 100644
--- a/server/website/website/models.py
+++ b/server/website/website/models.py
@@ -188,6 +188,9 @@ class Session(BaseModel):
     hardware = models.ForeignKey(Hardware)
     algorithm = models.IntegerField(choices=AlgorithmType.choices(),
                                     default=AlgorithmType.OTTERTUNE)
+    ddpg_actor_model = models.BinaryField(null=True, blank=True)
+    ddpg_critic_model = models.BinaryField(null=True, blank=True)
+    ddpg_reply_memory = models.BinaryField(null=True, blank=True)
 
     project = models.ForeignKey(Project)
     creation_time = models.DateTimeField()
@@ -200,7 +203,7 @@ class Session(BaseModel):
         ("randomly_generate", "Randomly Generate")
     ]
     tuning_session = models.CharField(choices=TUNING_OPTIONS,
-                                      max_length=64, default='tuning_sesion')
+                                      max_length=64, default='tuning_session')
 
     TARGET_OBJECTIVES = [
         ('throughput_txn_per_sec', 'Throughput'),