diff --git a/public/locales/de/translation.json b/public/locales/de/translation.json
index 1f79f88..312d59c 100644
--- a/public/locales/de/translation.json
+++ b/public/locales/de/translation.json
@@ -65,6 +65,9 @@
   "groupTasks.groupTasksTableList.button.reload": "Neu laden",
   "groupTasks.groupTasksTableList.popover.title": "Sind Sie sicher, dass Sie die Gruppenkonfigurationen neu laden wollen?",
   "groupTasks.groupTasksTableList.popover.buttonOk": "Ja",
+  "groupTasks.button.checkingForCategoryGroupChanges": "Prüfung auf Änderungen der Kategoriegruppen",
+  "groupTasks.button.checkingForCategoryGroupChanges.checkingForCategoryGroupChanges.popover.title": "Sind Sie sicher, dass Sie die Kategoriegruppen prüfen wollen? (Während der Prüfung schaut der Server nach neuen Kategoriegruppen und löscht ggf. nicht mehr vorhandene)",
+  "groupTasks.button.checkingForCategoryGroupChanges.popover.buttonOk": "Prüfen",
   "logCard.popover.groupTaskId.title": "Gruppenaufgabe",
   "logCard.popover.groupTaskStep.title": "Gruppenaufgabe Schritt",
   "logCard.popover.role.title": "Rolle",
diff --git a/public/locales/en/translation.json b/public/locales/en/translation.json
index eb0a57c..2beb463 100644
--- a/public/locales/en/translation.json
+++ b/public/locales/en/translation.json
@@ -65,6 +65,9 @@
   "groupTasks.groupTasksTableList.button.reload": "Reload",
   "groupTasks.groupTasksTableList.popover.title": "Are you sure you want to reload the group configs?",
   "groupTasks.groupTasksTableList.popover.buttonOk": "Yes",
+  "groupTasks.button.checkingForCategoryGroupChanges": "Checking for changes to the category groups",
+  "groupTasks.button.checkingForCategoryGroupChanges.checkingForCategoryGroupChanges.popover.title": "Are you sure you want to check the category groups? (During the check, the server looks for new category groups and deletes any that no longer exist)",
+  "groupTasks.button.checkingForCategoryGroupChanges.popover.buttonOk": "Verify",
   "logCard.popover.groupTaskId.title": "Group Task",
   "logCard.popover.groupTaskStep.title": "Group Task Step",
   "logCard.popover.role.title": "Role",
diff --git a/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js b/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js
index 410c153..c66262f 100644
--- a/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js
+++ b/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js
@@ -901,7 +901,6 @@ function GroupTaskStepLogHandler({ currentGroupTaskId, log, files }) {
             {getTag(nonImageFile)}
           </div>
         );
-        console.log("url", getDownloadUrl(nonImageFile));
       } else {
         elements.push(getTag(nonImageFile));
       }
diff --git a/src/Pages/GroupTasks/Overview/index.js b/src/Pages/GroupTasks/Overview/index.js
index 193b27a..4da8e39 100644
--- a/src/Pages/GroupTasks/Overview/index.js
+++ b/src/Pages/GroupTasks/Overview/index.js
@@ -1,10 +1,17 @@
-import { Result } from "antd";
+import { Button, Popconfirm, Result } from "antd";
 import { useContext, useState } from "react";
 import GroupTasksViewModal from "./GroupTasksViewModal";
 import GroupTypeSelectionModal from "./GroupTypeSelectionModal";
 import GroupTaskTableList from "./GroupTasksTableList";
-import { Constants, WebSocketContext, hasXYPermission } from "../../../utils";
+import {
+  Constants,
+  SentMessagesCommands,
+  WebSocketContext,
+  hasPermission,
+  hasXYPermission,
+} from "../../../utils";
 import { useTranslation } from "react-i18next";
+import { ReloadOutlined } from "@ant-design/icons";
 
 export default function GroupTasks({ isGroupTasksViewModalOpen }) {
   const [isGroupTypeSelectionModalOpen, setIsGroupTypeSelectionModalOpen] =
@@ -30,6 +37,13 @@ export default function GroupTasks({ isGroupTasksViewModalOpen }) {
       )
   );
 
+  const onCheckingForCategoryGroupChanges = () => {
+    webSocketContext.SendSocketMessage(
+      SentMessagesCommands.GroupTasksCheckingForCategoryGroupChanges,
+      {}
+    );
+  };
+
   return (
     <>
       {webSocketContext.CategoryGroups.length === 0 ? (
@@ -69,6 +83,35 @@ export default function GroupTasks({ isGroupTasksViewModalOpen }) {
       />
 
       <GroupTasksViewModal isOpen={isGroupTasksViewModalOpen} />
+
+      {hasPermission(
+        webSocketContext.User.Permissions,
+        Constants.PERMISSIONS.GROUP_TASKS.CHECKING_FOR_CATEGORY_GROUP_CHANGES
+      ) && (
+        <div
+          style={{
+            display: "flex",
+            justifyContent: "center",
+            marginTop: 20,
+          }}
+        >
+          <Popconfirm
+            placement="top"
+            okText={t(
+              "groupTasks.button.checkingForCategoryGroupChanges.popover.buttonOk"
+            )}
+            cancelText={t("buttonCancel")}
+            title={t(
+              "groupTasks.button.checkingForCategoryGroupChanges.checkingForCategoryGroupChanges.popover.title"
+            )}
+            onConfirm={() => onCheckingForCategoryGroupChanges()}
+          >
+            <Button shape="round" icon={<ReloadOutlined />} size="large">
+              {t("groupTasks.button.checkingForCategoryGroupChanges")}
+            </Button>
+          </Popconfirm>
+        </div>
+      )}
     </>
   );
 }
diff --git a/src/utils.js b/src/utils.js
index fa56718..9cf60b5 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -48,6 +48,8 @@ export const Constants = {
         XYView: "group_tasks.overview.XY.view",
       },
       HISTORY: "group_tasks.history",
+      CHECKING_FOR_CATEGORY_GROUP_CHANGES:
+        "group_tasks.checking_for_category_group_changes",
     },
     ALL_USERS: {
       CREATE_NEW_USER: "all_users.create_new_user",
@@ -185,6 +187,7 @@ const ReceivedMessagesCommands = {
   AllUsersNewUserCreated: 26,
   AllUsersUserDeleted: 27,
   AllUsersUserDeactivation: 28,
+  GroupTasksCategoryGroupChanges: 29,
 };
 
 // commands sent to the backend server
@@ -205,6 +208,7 @@ export const SentMessagesCommands = {
   AllUsersUserDeactivation: 14,
   ScannersUseScanners: 15,
   ScannersDisconnectScanner: 16,
+  GroupTasksCheckingForCategoryGroupChanges: 17,
 };
 
 export function WebSocketProvider({
@@ -341,12 +345,49 @@ export function WebSocketProvider({
           });
           break;
         case ReceivedMessagesCommands.GroupTasksReloaded:
+          if (body.RemovedCategory !== undefined) {
+            setCategoryGroups((arr) =>
+              arr.filter((arr1) => arr1.category !== body.RemovedCategory)
+            );
+
+            setUser((user) => {
+              const updatedUser = { ...user };
+
+              updatedUser.Permissions = updatedUser.Permissions.filter(
+                (arr) => !body.RemovedPermissions.some((a) => a === arr)
+              );
+
+              return updatedUser;
+            });
+
+            setAdminAreaRolesPermissions((arr) => {
+              const newArr = [...arr];
+
+              newArr.forEach((role, i) => {
+                if (role.Permissions !== null) {
+                  newArr[i].Permissions = role.Permissions.filter(
+                    (b) => !body.RemovedPermissions.some((c) => c === b)
+                  );
+                }
+              });
+
+              return newArr;
+            });
+
+            notificationApi["info"]({
+              message: `Category ${body.RemovedCategory} was removed`,
+              duration: 2,
+            });
+
+            break;
+          }
+
           setCategoryGroups((arr) => {
             const newArr = [...arr];
 
             newArr[
               arr.findIndex((arr1) => arr1.category === body.Category)
-            ].groups = body.UpdatedGroups;
+            ].groups = body.CategoryGroups;
 
             return newArr;
           });
@@ -826,6 +867,8 @@ export function WebSocketProvider({
             return newArr;
           });
           break;
+        case ReceivedMessagesCommands.GroupTasksCategoryGroupChanges:
+          break;
 
         default:
           console.error("unknown command", cmd);