Can you assist me in determining the issue with my code?
import griddb_python as gdb
# Connect to the GridDB server
factory = gdb.StoreFactory.get_instance()
store = factory.get_store(host='localhost', port=31999)
# Insert a new customer into the "Customers" table
store.put(container_name='Customers', rows=[(1, 'John Smith',
'john.smith@example.com', '555-555-5555'),
(2, 'Jane Doe', 'jane.doe@example.com', '555-555-5556')])
ORA-00001: unique constraint (sales.PK_Customers) violated
