diff --git a/.github/workflows/appbuild.yml b/.github/workflows/appbuild.yml
deleted file mode 100644
index 4566f2e23..000000000
--- a/.github/workflows/appbuild.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-name: Package build
-
-on:
-  pull_request:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [14.x]
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v3
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Set up npm7
-      run: npm i -g npm@7
-    - name: Setup PHP
-      uses: shivammathur/setup-php@2.18.0
-      with:
-        php-version: '7.4'
-        tools: composer
-    - name: install dependencies
-      run: |
-        wget https://github.com/ChristophWurst/krankerl/releases/download/v0.12.2/krankerl_0.12.2_amd64.deb
-        sudo dpkg -i krankerl_0.12.2_amd64.deb
-    - name: package
-      run: |
-        uname -a
-        RUST_BACKTRACE=1 krankerl --version
-        RUST_BACKTRACE=1 krankerl package
-    - uses: actions/upload-artifact@v3
-      with:
-        name: Deck app tarball
-        path: build/artifacts/deck.tar.gz
diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index eb8f7d7c4..a7a97f9ea 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -62,11 +62,12 @@ jobs:
           path: apps/${{ env.APP_NAME }}
 
       - name: Set up php ${{ matrix.php-versions }}
-        uses: shivammathur/setup-php@2.18.0
+        uses: shivammathur/setup-php@2.24.0
         with:
           php-version: ${{ matrix.php-versions }}
           tools: phpunit
           extensions: zip, gd, mbstring, iconv, fileinfo, intl, sqlite, pdo_sqlite, mysql, pdo_mysql, pgsql, pdo_pgsql
+          ini-file: development
           coverage: none
 
       - name: Set up PHPUnit
diff --git a/lib/Collaboration/Resources/ResourceProvider.php b/lib/Collaboration/Resources/ResourceProvider.php
index b4677148d..974976b0f 100644
--- a/lib/Collaboration/Resources/ResourceProvider.php
+++ b/lib/Collaboration/Resources/ResourceProvider.php
@@ -108,7 +108,7 @@ public function canAccessResource(IResource $resource, ?IUser $user): bool {
 
 	private function getBoard(IResource $resource) {
 		try {
-			return $this->boardMapper->find($resource->getId(), false, true);
+			return $this->boardMapper->find((int)$resource->getId(), false, true);
 		} catch (DoesNotExistException $e) {
 		} catch (MultipleObjectsReturnedException $e) {
 			return null;
diff --git a/lib/Db/BoardMapper.php b/lib/Db/BoardMapper.php
index 93be76d7e..5b1e6407e 100644
--- a/lib/Db/BoardMapper.php
+++ b/lib/Db/BoardMapper.php
@@ -79,12 +79,14 @@ public function __construct(
 	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
 	 * @throws DoesNotExistException
 	 */
-	public function find($id, $withLabels = false, $withAcl = false): Board {
+	public function find(int $id, bool $withLabels = false, bool $withAcl = false, bool $allowDeleted = false): Board {
 		if (!isset($this->boardCache[$id])) {
 			$qb = $this->db->getQueryBuilder();
+			$deletedWhere = $allowDeleted ? $qb->expr()->gte('deleted_at', $qb->createNamedParameter(0, IQueryBuilder::PARAM_INT)) : $qb->expr()->eq('deleted_at', $qb->createNamedParameter(0, IQueryBuilder::PARAM_INT));
 			$qb->select('*')
 				->from('deck_boards')
 				->where($qb->expr()->eq('id', $qb->createNamedParameter($id, IQueryBuilder::PARAM_INT)))
+				->andWhere($deletedWhere)
 				->orderBy('id');
 			$this->boardCache[$id] = $this->findEntity($qb);
 		}
diff --git a/lib/Service/BoardService.php b/lib/Service/BoardService.php
index 9a98decbf..f1cf2b55f 100644
--- a/lib/Service/BoardService.php
+++ b/lib/Service/BoardService.php
@@ -181,7 +181,7 @@ public function findAll($since = -1, $details = null, $includeArchived = true) {
 	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
 	 * @throws BadRequestException
 	 */
-	public function find($boardId) {
+	public function find($boardId, bool $allowDeleted = false) {
 		$this->boardServiceValidator->check(compact('boardId'));
 		if ($this->boardsCache && isset($this->boardsCache[$boardId])) {
 			return $this->boardsCache[$boardId];
@@ -192,7 +192,7 @@ public function find($boardId) {
 
 		$this->permissionService->checkPermission($this->boardMapper, $boardId, Acl::PERMISSION_READ);
 		/** @var Board $board */
-		$board = $this->boardMapper->find($boardId, true, true);
+		$board = $this->boardMapper->find((int)$boardId, true, true, $allowDeleted);
 		$this->boardMapper->mapOwner($board);
 		if ($board->getAcl() !== null) {
 			foreach ($board->getAcl() as $acl) {
@@ -367,7 +367,7 @@ public function deleteUndo($id) {
 		$this->boardServiceValidator->check(compact('id'));
 
 		$this->permissionService->checkPermission($this->boardMapper, $id, Acl::PERMISSION_MANAGE);
-		$board = $this->find($id);
+		$board = $this->find($id, true);
 		$board->setDeletedAt(0);
 		$board = $this->boardMapper->update($board);
 		$this->activityManager->triggerEvent(ActivityManager::DECK_OBJECT_BOARD, $board, ActivityManager::SUBJECT_BOARD_RESTORE);
@@ -388,7 +388,7 @@ public function deleteForce($id) {
 		$this->boardServiceValidator->check(compact('id'));
 
 		$this->permissionService->checkPermission($this->boardMapper, $id, Acl::PERMISSION_MANAGE);
-		$board = $this->find($id);
+		$board = $this->find($id, true);
 		$delete = $this->boardMapper->delete($board);
 
 		return $delete;
diff --git a/lib/Service/CardService.php b/lib/Service/CardService.php
index 17fc539f4..717b0b15d 100644
--- a/lib/Service/CardService.php
+++ b/lib/Service/CardService.php
@@ -274,6 +274,14 @@ public function update($id, $title, $stackId, $type, $owner, $description = '',
 		if ($archived !== null && $card->getArchived() && $archived === true) {
 			throw new StatusException('Operation not allowed. This card is archived.');
 		}
+
+		if ($card->getDeletedAt() !== 0) {
+			if ($deletedAt === null) {
+				// Only allow operations when restoring the card
+				throw new StatusException('Operation not allowed. This card was deleted.');
+			}
+		}
+
 		$changes = new ChangeSet($card);
 		if ($card->getLastEditor() !== $this->currentUser && $card->getLastEditor() !== null) {
 			$this->activityManager->triggerEvent(
diff --git a/lib/Service/PermissionService.php b/lib/Service/PermissionService.php
index 06a6da62d..c42ca8045 100644
--- a/lib/Service/PermissionService.php
+++ b/lib/Service/PermissionService.php
@@ -194,11 +194,11 @@ public function userIsBoardOwner($boardId, $userId = null) {
 	 * @throws MultipleObjectsReturnedException
 	 * @throws DoesNotExistException
 	 */
-	private function getBoard($boardId): Board {
-		if (!isset($this->boardCache[$boardId])) {
-			$this->boardCache[$boardId] = $this->boardMapper->find($boardId, false, true);
+	private function getBoard(int $boardId): Board {
+		if (!isset($this->boardCache[(string)$boardId])) {
+			$this->boardCache[(string)$boardId] = $this->boardMapper->find($boardId, false, true);
 		}
-		return $this->boardCache[$boardId];
+		return $this->boardCache[(string)$boardId];
 	}
 
 	/**
diff --git a/tests/integration/base-query-count.txt b/tests/integration/base-query-count.txt
new file mode 100644
index 000000000..4fe36e923
--- /dev/null
+++ b/tests/integration/base-query-count.txt
@@ -0,0 +1 @@
+68024
diff --git a/tests/unit/Activity/ActivityManagerTest.php b/tests/unit/Activity/ActivityManagerTest.php
index 700d72b19..0e277f35c 100644
--- a/tests/unit/Activity/ActivityManagerTest.php
+++ b/tests/unit/Activity/ActivityManagerTest.php
@@ -131,6 +131,7 @@ private function expectEventCreation($subject, $subjectParams) {
 
 	public function testCreateEvent() {
 		$board = new Board();
+		$board->setId(123);
 		$board->setTitle('');
 		$this->boardMapper->expects(self::once())
 			->method('find')
@@ -148,6 +149,7 @@ public function testCreateEvent() {
 
 	public function testCreateEventDescription() {
 		$board = new Board();
+		$board->setId(123);
 		$board->setTitle('');
 		$this->boardMapper->expects(self::once())
 			->method('find')
@@ -162,7 +164,9 @@ public function testCreateEventDescription() {
 			->method('find')
 			->willReturn($card);
 
-		$stack = Stack::fromRow([]);
+		$stack = Stack::fromRow([
+			'boardId' => 123,
+		]);
 		$this->stackMapper->expects(self::any())
 			->method('find')
 			->willReturn($stack);
@@ -192,6 +196,7 @@ public function testCreateEventDescription() {
 
 	public function testCreateEventLongDescription() {
 		$board = new Board();
+		$board->setId(123);
 		$board->setTitle('');
 		$this->boardMapper->expects(self::once())
 			->method('find')
@@ -205,7 +210,9 @@ public function testCreateEventLongDescription() {
 			->method('find')
 			->willReturn($card);
 
-		$stack = new Stack();
+		$stack = Stack::fromRow([
+			'boardId' => 123,
+		]);
 		$this->stackMapper->expects(self::any())
 			->method('find')
 			->willReturn($stack);
@@ -235,6 +242,7 @@ public function testCreateEventLongDescription() {
 
 	public function testCreateEventLabel() {
 		$board = Board::fromRow([
+			'id' => 123,
 			'title' => 'My board'
 		]);
 		$this->boardMapper->expects(self::once())
@@ -249,7 +257,9 @@ public function testCreateEventLabel() {
 			->method('find')
 			->willReturn($card);
 
-		$stack = Stack::fromParams([]);
+		$stack = Stack::fromRow([
+			'boardId' => 123,
+		]);
 		$this->stackMapper->expects(self::any())
 			->method('find')
 			->willReturn($stack);