diff --git a/src/Entity/UserSystem/PermissionData.php b/src/Entity/UserSystem/PermissionData.php
index 9ebdc9c9..b7d1ff8f 100644
--- a/src/Entity/UserSystem/PermissionData.php
+++ b/src/Entity/UserSystem/PermissionData.php
@@ -43,7 +43,7 @@ final class PermissionData implements \JsonSerializable
     /**
      * The current schema version of the permission data
      */
-    public const CURRENT_SCHEMA_VERSION = 3;
+    public const CURRENT_SCHEMA_VERSION = 4;
 
     /**
      * Creates a new Permission Data Instance using the given data.
diff --git a/src/Services/UserSystem/PermissionSchemaUpdater.php b/src/Services/UserSystem/PermissionSchemaUpdater.php
index 104800dc..fd85ee7c 100644
--- a/src/Services/UserSystem/PermissionSchemaUpdater.php
+++ b/src/Services/UserSystem/PermissionSchemaUpdater.php
@@ -157,4 +157,20 @@ class PermissionSchemaUpdater
             $permissions->setPermissionValue('system', 'show_updates', $new_value);
         }
     }
+
+    private function upgradeSchemaToVersion4(HasPermissionsInterface $holder): void //@phpstan-ignore-line This is called via reflection
+    {
+        $permissions = $holder->getPermissions();
+
+        //If the reports.generate permission is not defined yet, set it to the value of reports.read
+        if (!$permissions->isPermissionSet('parts_stock', 'stocktake')) {
+            //Set the new permission to true only if both add and withdraw are allowed
+            $new_value = TrinaryLogicHelper::and(
+                $permissions->getPermissionValue('parts_stock', 'withdraw'),
+                $permissions->getPermissionValue('parts_stock', 'add')
+            );
+
+            $permissions->setPermissionValue('parts_stock', 'stocktake', $new_value);
+        }
+    }
 }