diff --git a/lib/Db/Bill.php b/lib/Db/Bill.php
index 862ee6b83..2fa9edee3 100644
--- a/lib/Db/Bill.php
+++ b/lib/Db/Bill.php
@@ -48,21 +48,21 @@
  * @method void setDeleted(int $deleted) */
 class Bill extends Entity implements \JsonSerializable {
 
-	protected string $what = '...';
-	protected ?string $comment = null;
-	protected int $payerId = 0;
-	protected float $amount = -1;
-	protected int $timestamp = 0;
-	protected string $repeat = 'n';
-	protected int $repeatAllActive = 0;
-	protected ?string $repeatUntil = null;
-	protected int $repeatFrequency = 1;
-	protected string $projectId = '';
-	protected ?int $categoryId = null;
-	protected ?string $paymentMode = null;
-	protected ?int $paymentModeId = 0;
-	protected int $lastChanged = 0;
-	protected int $deleted = 0;
+	protected $what;
+	protected $comment;
+	protected $payerId;
+	protected $amount;
+	protected $timestamp;
+	protected $repeat;
+	protected $repeatAllActive;
+	protected $repeatUntil;
+	protected $repeatFrequency;
+	protected $projectId;
+	protected $categoryId;
+	protected $paymentMode;
+	protected $paymentModeId;
+	protected $lastChanged;
+	protected $deleted;
 
 	public function __construct() {
 		$this->addType('id', 'integer');
diff --git a/lib/Db/BillOwer.php b/lib/Db/BillOwer.php
index c2ce2b64c..1cd62d55f 100644
--- a/lib/Db/BillOwer.php
+++ b/lib/Db/BillOwer.php
@@ -22,8 +22,8 @@
  **/
 class BillOwer extends Entity implements \JsonSerializable {
 
-	protected int $billId = 0;
-	protected int $memberId = 0;
+	protected $billId;
+	protected $memberId;
 
 	public function __construct() {
 		$this->addType('id', 'integer');
diff --git a/lib/Db/Category.php b/lib/Db/Category.php
index 37f91b9aa..679321f30 100644
--- a/lib/Db/Category.php
+++ b/lib/Db/Category.php
@@ -23,11 +23,12 @@
  * @method int getOrder()
  */
 class Category extends Entity implements \JsonSerializable {
-	protected string $projectId = '';
-	protected ?string $name = null;
-	protected ?string $color = null;
-	protected ?string $encodedIcon = null;
-	protected int $order = 0;
+
+	protected $projectId;
+	protected $name;
+	protected $color;
+	protected $encodedIcon;
+	protected $order;
 
 	public function __construct() {
 		$this->addType('project_id', 'string');
diff --git a/lib/Db/Currency.php b/lib/Db/Currency.php
index 7b65e4014..a58cb1086 100644
--- a/lib/Db/Currency.php
+++ b/lib/Db/Currency.php
@@ -19,9 +19,10 @@
  * @method float getExchangeRate()
  */
 class Currency extends Entity implements \JsonSerializable {
-	protected string $projectId = '';
-	protected string $name = '';
-	protected float $exchangeRate = -999;
+
+	protected $projectId;
+	protected $name;
+	protected $exchangeRate;
 
 	public function __construct() {
 		$this->addType('project_id', 'string');
diff --git a/lib/Db/Invitation.php b/lib/Db/Invitation.php
index 423160df4..8e28b7f17 100644
--- a/lib/Db/Invitation.php
+++ b/lib/Db/Invitation.php
@@ -29,17 +29,18 @@
  * @method string getInviterDisplayName()
  */
 class Invitation extends Entity implements \JsonSerializable {
+
 	public const STATE_PENDING = 0;
 	public const STATE_ACCEPTED = 1;
 
-	protected string $userId = '';
-	protected int $state = self::STATE_PENDING;
-	protected string $accessToken = '';
-	protected string $remoteProjectId = '';
-	protected string $remoteProjectName = '...';
-	protected string $remoteServerUrl = '';
-	protected string $inviterCloudId = '';
-	protected string $inviterDisplayName = '';
+	protected $userId;
+	protected $state;
+	protected $accessToken;
+	protected $remoteProjectId;
+	protected $remoteProjectName;
+	protected $remoteServerUrl;
+	protected $inviterCloudId;
+	protected $inviterDisplayName;
 
 	public function __construct() {
 		$this->addType('userId', 'string');
diff --git a/lib/Db/Member.php b/lib/Db/Member.php
index 09ec0be7f..119b4e6cf 100644
--- a/lib/Db/Member.php
+++ b/lib/Db/Member.php
@@ -36,13 +36,13 @@
  */
 class Member extends Entity implements \JsonSerializable {
 
-	protected string $projectId = '';
-	protected string $name = '';
-	protected float $weight = -1;
-	protected int $activated = 1;
-	protected int $lastChanged = 0;
-	protected ?string $color = null;
-	protected ?string $userId = null;
+	protected $projectId;
+	protected $name;
+	protected $weight;
+	protected $activated;
+	protected $lastChanged;
+	protected $color;
+	protected $userId;
 
 	private $avatarManager;
 
diff --git a/lib/Db/PaymentMode.php b/lib/Db/PaymentMode.php
index 778e18250..2276f1b24 100644
--- a/lib/Db/PaymentMode.php
+++ b/lib/Db/PaymentMode.php
@@ -25,12 +25,13 @@
  * @method string|null getOldId()
  */
 class PaymentMode extends Entity implements \JsonSerializable {
-	protected string $projectId = '';
-	protected ?string $name = null;
-	protected ?string $color = null;
-	protected ?string $encodedIcon = null;
-	protected int $order = 0;
-	protected ?string $oldId = null;
+
+	protected $projectId;
+	protected $name;
+	protected $color;
+	protected $encodedIcon;
+	protected $order;
+	protected $oldId;
 
 	public function __construct() {
 		$this->addType('project_id', 'string');
diff --git a/lib/Db/Project.php b/lib/Db/Project.php
index adc0e1448..4717f6d87 100644
--- a/lib/Db/Project.php
+++ b/lib/Db/Project.php
@@ -38,15 +38,15 @@
  */
 class Project extends Entity implements \JsonSerializable {
 
-	protected string $userId = '';
-	protected string $name = '';
-	protected string $autoExport = 'n';
-	protected int $lastChanged = 0;
-	protected int $deletionDisabled = 0;
-	protected string $categorySort = 'a';
-	protected string $paymentModeSort = 'a';
-	protected ?string $currencyName = null;
-	protected ?int $archivedTs = null;
+	protected $userId;
+	protected $name;
+	protected $autoExport;
+	protected $lastChanged;
+	protected $deletionDisabled;
+	protected $categorySort;
+	protected $paymentModeSort;
+	protected $currencyName;
+	protected $archivedTs;
 
 	public function __construct() {
 		$this->addType('id', 'string');
diff --git a/lib/Db/Share.php b/lib/Db/Share.php
index fdd520e5a..fc2eeee9b 100644
--- a/lib/Db/Share.php
+++ b/lib/Db/Share.php
@@ -31,21 +31,22 @@
  * @method int|null getState()
  */
 class Share extends Entity implements \JsonSerializable {
+
 	public const TYPE_FEDERATION = 'f';
 	public const TYPE_PUBLIC_LINK = 'l';
 	public const TYPE_USER = 'u';
 	public const TYPE_GROUP = 'g';
 	public const TYPE_CIRCLE = 'c';
 
-	protected string $projectId = '';
-	protected ?string $userId = null;
-	protected string $type = self::TYPE_USER;
-	protected int $accessLevel = 2;
-	protected int $manuallyAdded = 1;
-	protected ?string $label = null;
-	protected ?string $password = null;
-	protected ?string $userCloudId = null;
-	protected ?int $state = null;
+	protected $projectId;
+	protected $userId;
+	protected $type;
+	protected $accessLevel;
+	protected $manuallyAdded;
+	protected $label;
+	protected $password;
+	protected $userCloudId;
+	protected $state;
 
 	public function __construct() {
 		$this->addType('project_id', 'string');