Heroku: tables not generated when db:migrate for Rails app - ruby-on-rails

Question

I'm a bit stuck in migrating database in Heroku. I've deployed app and in final stage I've done this to have PostgreSQL database migration:
ubuntu#ubuntu-xenial:/vagrant/myappname$ heroku run rake db:migrate --trace
Running rake db:migrate --trace on ⬢ myappname... up, run.5129 (Free)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Execute db:load_config
** Execute db:migrate
(12.1ms) CREATE TABLE "schema_migrations" ("version" character varying PRIMARY KEY)
(6.8ms) CREATE TABLE "ar_internal_metadata" ("key" character varying PRIMARY KEY, "value" character varying, "created_at" timestamp NOT NULL, "updated_at" timestamp NOT NULL)
(1.1ms) SELECT pg_try_advisory_lock(5132908415839787310);
ActiveRecord::SchemaMigration Load (1.2ms) SELECT "schema_migrations".* FROM "schema_migrations"
ActiveRecord::InternalMetadata Load (1.1ms) SELECT "ar_internal_metadata".* FROM "ar_internal_metadata" WHERE "ar_internal_metadata"."key" = $1 LIMIT $2 [["key", :environment], ["LIMIT", 1]]
(1.4ms) BEGIN
SQL (1.2ms) INSERT INTO "ar_internal_metadata" ("key", "value", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "key" [["key", "environment"], ["value", "production"], ["created_at", 2017-01-26 05:33:42 UTC], ["updated_at", 2017-01-26 05:33:42 UTC]]
(1.7ms) COMMIT
(0.9ms) SELECT pg_advisory_unlock(5132908415839787310)
** Invoke db:_dump (first_time)
** Execute db:_dump
ubuntu#ubuntu-xenial:/vagrant/myappname$ heroku pg:psql
--> Connecting to postgresql-cylindrical-63703
psql (9.6.1)
SSL connection (protocol: TLSv1.2, cipher: ECDHE-RSA-AES256-GCM-SHA384, bits: 256, compression: off)
Type "help" for help.
mydatabasename::DATABASE=> \dt
List of relations
Schema | Name | Type | Owner
--------+----------------------+-------+----------------
public | ar_internal_metadata | table | OWNER
public | schema_migrations | table | OWNER
(2 rows)
It looks like it is not loading my Rails5 app schema.rb
What could be wrong, why there is no tables of my app? Thank you!