How can the absence of a sessions table in the database affect session handling in PHP during a server migration?

The absence of a sessions table in the database can affect session handling in PHP during a server migration because PHP stores session data in a table within the database. To solve this issue, you need to create a sessions table in the database to store session data.

```php
CREATE TABLE sessions (
    id VARCHAR(128) NOT NULL PRIMARY KEY,
    data TEXT,
    timestamp INT(11) NOT NULL
);
```

Make sure to update your PHP configuration to use this newly created sessions table for session handling.