Remove the or current_app['FROM_NUMBER'] since sms_sender is a required field.

app/models.py

@@ -245,7 +245,7 @@ class Service(db.Model, Versioned):
         if self.inbound_number and self.inbound_number.active:
             return self.inbound_number.number
         else:
-            return self.sms_sender or current_app.config['FROM_NUMBER']
+            return self.sms_sender
 
 
 class InboundNumber(db.Model):

migrations/versions/0119_insert_service_sms_senders.py

@@ -1,55 +0,0 @@
-"""empty message
-
-Revision ID: 0119_insert_service_sms_senders
-Revises: 0118_service_sms_senders
-Create Date: 2017-09-05 17:21:14.816199
-
-"""
-import uuid
-
-from alembic import op
-
-revision = '0119_insert_service_sms_senders'
-down_revision = '0118_service_sms_senders'
-
-
-def upgrade():
-    query = """SELECT id, number, service_id
-               FROM inbound_numbers
-               WHERE service_id is not null"""
-
-    conn = op.get_bind()
-    results = conn.execute(query)
-    res = results.fetchall()
-
-    for x in res:
-        op.execute(
-            """
-            INSERT INTO service_sms_senders
-            (
-                id,
-                sms_sender,
-                service_id,
-                inbound_number_id,
-                is_default,
-                created_at
-            )
-            VALUES
-            (
-                '{}',
-                '{}',
-                '{}',
-                '{}',
-                True,
-                now()
-            )
-            """.format(uuid.uuid4(), x.number, x.service_id, x.id)
-        )
-
-
-def downgrade():
-    op.execute(
-        """
-        DELETE FROM service_sms_senders
-        """
-    )