关联模型创建子项出现错误，丢失关联 ID

复制的代码
版本是5.7

$installment->items()->create([
                'sequence' => $i,
                'base'     => $base,
                'fee'      => $fee,
                'due_date' => $dueDate,
            ]);

message: "SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'installment_id' cannot be null (SQL: insert into installment_items (sequence, base, fee, due_date, *installmentid*, updated_at, created_at) values (0, 418.75, 10.46, 2019-01-19 00:00:00, , 2019-01-18 19:56:21, 2019-01-18 19:56:21))"