diff --git a/src/classes/prayer/person.class.php b/src/classes/addressbook/person.class.php
similarity index 80%
rename from src/classes/prayer/person.class.php
rename to src/classes/addressbook/person.class.php
index 9cb8aa30..034bd2da 100644
--- a/src/classes/prayer/person.class.php
+++ b/src/classes/addressbook/person.class.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Obadiah\Prayer;
+namespace Obadiah\AddressBook;
 
 use Obadiah\App;
 
@@ -11,13 +11,15 @@ class Person
     /**
      * Create Person object.
      *
-     * @param string $first_name        Person's first name.
-     * @param string $last_name         Person's last name.
+     * @param int $id                   ChurchSuite ID.
+     * @param string $first_name        First name.
+     * @param string $last_name         Last name.
      * @param bool $is_child            Whether or not this person is a child.
      * @param ?string $image_url        Optional URL to the person's photo (if they have uploaded one).
      * @return void
      */
     public function __construct(
+        public readonly int $id,
         public readonly string $first_name,
         public readonly string $last_name,
         public readonly bool $is_child,
diff --git a/src/classes/cache/cache.class.php b/src/classes/cache/cache.class.php
index acd114f8..2d8969a0 100644
--- a/src/classes/cache/cache.class.php
+++ b/src/classes/cache/cache.class.php
@@ -3,6 +3,7 @@
 namespace Obadiah\Cache;
 
 use Obadiah\App;
+use Obadiah\AddressBook\Person;
 use Obadiah\Bible\Bible_Plan;
 use Obadiah\Calendar\Event;
 use Obadiah\ChurchSuite\Api;
@@ -10,9 +11,7 @@
 use Obadiah\Helpers\IO;
 use Obadiah\Helpers\Serialise;
 use Obadiah\Lectionary\Lectionary;
-use Obadiah\Prayer\Person;
 use Obadiah\Refresh\Refresh;
-use Obadiah\Request\Request;
 use Obadiah\Rota\Rota;
 use SplFileInfo;
 
diff --git a/src/classes/churchsuite/api.class.php b/src/classes/churchsuite/api.class.php
index 0a7ca6a0..7644e252 100644
--- a/src/classes/churchsuite/api.class.php
+++ b/src/classes/churchsuite/api.class.php
@@ -3,11 +3,11 @@
 namespace Obadiah\ChurchSuite;
 
 use Obadiah\App;
+use Obadiah\AddressBook\Person;
 use Obadiah\Config\Config as C;
 use Obadiah\Helpers\Arr;
 use Obadiah\Helpers\Curl;
 use Obadiah\Helpers\Hash;
-use Obadiah\Prayer\Person;
 use Obadiah\Prayer\Prayer_Calendar;
 
 App::check();
@@ -28,7 +28,7 @@ class Api
      */
     public function __construct()
     {
-        $this->version = "v1";
+        $this->version = "v2";
     }
 
     /**
@@ -97,6 +97,7 @@ private function get_people(string $endpoint, string $kind, bool $are_children):
         foreach ($response[$kind] as $person) {
             $thumb_url = Arr::get(Arr::get(Arr::get($person, "images", []), "md", []), "url");
             $person = new Person(
+                id: Arr::get_integer($person, "id"),
                 first_name: Arr::get($person, "first_name"),
                 last_name: Arr::get($person, "last_name"),
                 is_child: $are_children,
diff --git a/src/classes/cli/commands/migrate.php b/src/classes/cli/commands/migrate.php
new file mode 100644
index 00000000..f8c37c1a
--- /dev/null
+++ b/src/classes/cli/commands/migrate.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace Obadiah\Cli\Commands;
+
+use Obadiah\App;
+use Obadiah\Cli\Command;
+
+App::check();
+
+class Migrate extends Command
+{
+    /**
+     * Create command.
+     *
+     * @return void
+     */
+    public function __construct() {}
+
+    /**
+     * Migrate to the latest version.
+     *
+     * @return void
+     */
+    public function execute(): void
+    {
+
+    }
+}
diff --git a/src/classes/helpers/hash.class.php b/src/classes/helpers/hash.class.php
index 9fb6515e..6634132a 100644
--- a/src/classes/helpers/hash.class.php
+++ b/src/classes/helpers/hash.class.php
@@ -3,7 +3,7 @@
 namespace Obadiah\Helpers;
 
 use Obadiah\App;
-use Obadiah\Prayer\Person;
+use Obadiah\AddressBook\Person;
 use Obadiah\Rota\Combined_Service;
 
 App::check();
@@ -29,7 +29,7 @@ public static function events_query(string $query): string
      */
     public static function person(Person $person): string
     {
-        return md5($person->get_full_name());
+        return md5(sprintf("%s-%s",$person->id, $person->get_full_name(false)));
     }
 
     /**
diff --git a/src/classes/prayer/prayer-calendar.class.php b/src/classes/prayer/prayer-calendar.class.php
index 599cd5c3..7e274b0f 100644
--- a/src/classes/prayer/prayer-calendar.class.php
+++ b/src/classes/prayer/prayer-calendar.class.php
@@ -4,6 +4,7 @@
 
 use DateTimeImmutable;
 use Obadiah\App;
+use Obadiah\AddressBook\Person;
 use Obadiah\Cache\Cache;
 use Obadiah\Config\Config as C;
 use Obadiah\Helpers\Arr;
diff --git a/src/classes/refresh/day.class.php b/src/classes/refresh/day.class.php
index f630325b..bf2e4074 100644
--- a/src/classes/refresh/day.class.php
+++ b/src/classes/refresh/day.class.php
@@ -4,13 +4,13 @@
 
 use DateTimeImmutable;
 use Obadiah\App;
+use Obadiah\AddressBook\Person;
 use Obadiah\Bible\Day as Readings;
 use Obadiah\Cache\Cache;
 use Obadiah\Calendar\Event;
 use Obadiah\Config\Config as C;
 use Obadiah\Helpers\Arr;
 use Obadiah\Helpers\Psalms;
-use Obadiah\Prayer\Person;
 
 App::check();
 
diff --git a/src/pages/prayer/person-part.php b/src/pages/prayer/person-part.php
index 72bf4aa5..cf506603 100644
--- a/src/pages/prayer/person-part.php
+++ b/src/pages/prayer/person-part.php
@@ -3,9 +3,9 @@
 namespace Obadiah\Pages\Prayer;
 
 use Obadiah\App;
+use Obadiah\AddressBook\Person;
 use Obadiah\Cache\Cache;
 use Obadiah\Helpers\Hash;
-use Obadiah\Prayer\Person;
 
 App::check();
 
diff --git a/src/pages/refresh/index-view.php b/src/pages/refresh/index-view.php
index 14061b8c..32895863 100644
--- a/src/pages/refresh/index-view.php
+++ b/src/pages/refresh/index-view.php
@@ -3,12 +3,12 @@
 namespace Obadiah\Pages\Refresh;
 
 use Obadiah\App;
+use Obadiah\AddressBook\Person;
 use Obadiah\Cache\Cache;
 use Obadiah\Config\Config as C;
 use Obadiah\Helpers\Image;
 use Obadiah\Helpers\Psalms;
 use Obadiah\Pages\Parts\Header\Header_Model;
-use Obadiah\Prayer\Person;
 use Obadiah\Request\Request;
 use Obadiah\Response\View;