diff --git a/app/bot.py b/app/bot.py
index f484bc8..bb737c9 100644
--- a/app/bot.py
+++ b/app/bot.py
@@ -554,9 +554,9 @@ def get_csv(message) -> None:
         connection = connect_db()
         bot_db = DatabaseQueries(connection)
         group_id: int = bot_db.get_group_id_by_telegram_id(telegram_id)
-        file_path: str = f"csv_tables/table_{group_id}.csv"
+        file_path: str = path.join(path.dirname(__file__), f"csv_tables/table_{group_id}.csv")
         table_headers: tuple = ("ID", "USERNAME", "TRANSFER", "TOTAL", "DATE", "CATEGORY", "DESCRIPTION")
-        table_data: tuple = bot_db.select_data_for_household_table(group_id, 0)
+        table_data: tuple[tuple, ...] = bot_db.select_data_for_household_table(group_id, 0)
         close_db(connection)
         if table_data:
             try:
@@ -699,7 +699,7 @@ def process_delete_account(message, username: str):
     if user_choice == f"👍 {get_phrase_by_language(user_language, "YES")}":
         connection = connect_db()
         bot_db = DatabaseQueries(connection)
-        bot_db.delete_username_from_users(username)
+        bot_db.delete_username_from_users_by_telegram_id(telegram_id)
         close_db(connection)
         bot.send_message(message.chat.id, f"{get_phrase_by_language(user_language, "parting")}")
         bot.send_message(message.chat.id, f"{get_phrase_by_language(user_language, "account_is_deleted")}",
diff --git a/app/build_project.py b/app/build_project.py
index 4c8c903..5926195 100644
--- a/app/build_project.py
+++ b/app/build_project.py
@@ -1,3 +1,4 @@
+import os
 import sys
 sys.path.append('../')
 from app.db_manager import connect_db, close_db  # noqa
@@ -7,6 +8,7 @@ def create_db() -> None:
     """
     Creates tables, using create_db.sql file describing their structures.
     """
+    os.makedirs('csv_tables', exist_ok=True)
     conn = connect_db()
     try:
         with conn.cursor() as cur:
diff --git a/app/create_db.sql b/app/create_db.sql
index 868ccdb..1b61f73 100644
--- a/app/create_db.sql
+++ b/app/create_db.sql
@@ -1,6 +1,6 @@
 CREATE TABLE IF NOT EXISTS groups (
     id    serial      PRIMARY KEY,
-    owner bigint      NOT NULL UNIQUE CHECK(telegram_id BETWEEN 1 AND 999999999999),
+    owner bigint      NOT NULL UNIQUE CHECK(owner BETWEEN 1 AND 999999999999),
     token varchar(32) NOT NULL UNIQUE CHECK(LENGTH(token) = 32)
 );
 
diff --git a/app/encryption.py b/app/encryption.py
index 122b58e..d8f7833 100644
--- a/app/encryption.py
+++ b/app/encryption.py
@@ -34,4 +34,4 @@ def getting_hash(secure_key: str, salt: str,
     :param salt: get_salt()
     :return: hash in hex format
     """
-    return pbkdf2_hmac(hash_algorithm, secure_key.encode('utf-8'), salt.encode('utf-8'), iterations, key_length).hex()
\ No newline at end of file
+    return pbkdf2_hmac(hash_algorithm, secure_key.encode('utf-8'), salt.encode('utf-8'), iterations, key_length).hex()
diff --git a/.requirements_external b/requirements_external.txt
similarity index 100%
rename from .requirements_external
rename to requirements_external.txt