Getting "sqlite3.OperationalError: near "ALTER": syntax error" when modifying datatype of a column [duplicate]

Our group is tasked to create and modify SQL tables (we chose to do it in Python) including the ALTER command but when we try to alter dataype of a column Job_id from CHAR (10) to VARCHAR (10), we always get this syntax.

Here's the code:

import sqlite3

# Connect to the database
conn = sqlite3.connect('employee.db')
cursor = conn.cursor()

cursor.execute("DROP TABLE IF EXISTS EMPLOYEE")
# Create table
create_table_query = '''
CREATE TABLE EMPLOYEE (
    Emp_no INTEGER PRIMARY KEY,
    E_name TEXT,
    E_address TEXT,
    E_ph_no TEXT,
    Dept_no INTEGER,
    Dept_name TEXT,
    Job_id CHAR(10),
    Salary REAL
);
'''
cursor.execute(create_table_query)

# Display the table schema
cursor.execute("PRAGMA table_info(EMPLOYEE)")
table_schema = cursor.fetchall()
print("Table Schema:")
for column in table_schema:
    print(column)

#2.) Alter table - Change the datatype of JOB_ID from char to varchar
cursor.execute('ALTER TABLE EMPLOYEE ALTER COLUMN Job_id VARCHAR (10);')

# Display the updated table schema
cursor.execute("PRAGMA table_info(EMPLOYEE)")
table_schema = cursor.fetchall()
print("\nUpdated Table Schema: Change the datatype of JOB_ID from char to varchar")
for column in table_schema:
    print(column)

conn.close()

The error occurs in Line 31 cursor.execute('ALTER TABLE EMPLOYEE ALTER COLUMN Job_id VARCHAR (10);')

I've tried different ways but still couldn't work:

cursor.execute('ALTER TABLE EMPLOYEE MODIFY COLUMN Job_id VARCHAR (10);')

cursor.execute('ALTER TABLE EMPLOYEE ALTER COLUMN Job_id TYPE VARCHAR (10);')

cursor.execute('ALTER TABLE EMPLOYEE ALTER COLUMN JOB_ID VARCHAR (10);')

We're expecting this output:

Updated Table Schema: Change the datatype of JOB_ID from char to varchar
(0, 'Emp_no', 'INTEGER', 0, None, 1)
(1, 'E_name', 'TEXT', 0, None, 0)
(2, 'E_address', 'TEXT', 0, None, 0)
(3, 'E_ph_no', 'TEXT', 0, None, 0)
(4, 'Dept_no', 'INTEGER', 0, None, 0)
(5, 'Dept_name', 'TEXT', 0, None, 0)
(6, 'Job_id', 'VARCHAR(10)', 0, None, 0)
(7, 'Salary', 'REAL', 0, None, 0)