associated not save data in second table in cakephp 3.4 - cakephp-3.0

Question

In my case three table just like facilities, ports and port_facilities. first two table make relation in port_facilities table and relation is many to many.
I already insert data facilities table and after this i try to insert data in port table and port_facilities. In port table data insert successfully but in port_facilities data not insert i try with associated but i dont know why data not insert in second table.
In port_facilities two primary key is 'port_id', 'facility_type_id'
port_id related to port and facility_type_id related to facilities table
In port Table my relation is
$this->hasMany('PortFacilities', [
'foreignKey' => 'port_id',
]);
In my controller add function data format is
$data = [
'port_name' => 'First Post',
'city' => 'First Post',
'state' => 'First Post',
'zipcode' => 'First Post',
'country_id' => 1,
'phone' => 'First Post',
'remark' => 'First Post',
'status' => 1,
'PortFacilities' => [
['port_id' => 81,
'facility_type_id' => 2,
'free' => 1,
'facility_cost' => 25,
]
]
];
$port = $this->Ports->newEntity();
$port = $this->Ports->patchEntity($port, $data,['associated' => ['PortFacilities']]);
$this->Ports->save($port);
In ports table data successfully insert but in PortFacilities not.
Please can you explain me about this where i m messing some or wrong code.
Thanks