diff --git a/frontend/src/api/api/task.service.ts b/frontend/src/api/api/task.service.ts
index c15e918..6299a9a 100644
--- a/frontend/src/api/api/task.service.ts
+++ b/frontend/src/api/api/task.service.ts
@@ -401,6 +401,63 @@ export class TaskService {
         );
     }
 
+    /**
+     * @param taskID internal id of task
+     * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
+     * @param reportProgress flag to report request and response progress.
+     */
+    public tasksTaskIDSubtasksDelete(taskID: number, observe?: 'body', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<SimpleStatusResponse>;
+    public tasksTaskIDSubtasksDelete(taskID: number, observe?: 'response', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<HttpResponse<SimpleStatusResponse>>;
+    public tasksTaskIDSubtasksDelete(taskID: number, observe?: 'events', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<HttpEvent<SimpleStatusResponse>>;
+    public tasksTaskIDSubtasksDelete(taskID: number, observe: any = 'body', reportProgress: boolean = false, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<any> {
+        if (taskID === null || taskID === undefined) {
+            throw new Error('Required parameter taskID was null or undefined when calling tasksTaskIDSubtasksDelete.');
+        }
+
+        let localVarHeaders = this.defaultHeaders;
+
+        let localVarCredential: string | undefined;
+        // authentication (API_TOKEN) required
+        localVarCredential = this.configuration.lookupCredential('API_TOKEN');
+        if (localVarCredential) {
+            localVarHeaders = localVarHeaders.set('Authorization', 'Bearer ' + localVarCredential);
+        }
+
+        let localVarHttpHeaderAcceptSelected: string | undefined = options && options.httpHeaderAccept;
+        if (localVarHttpHeaderAcceptSelected === undefined) {
+            // to determine the Accept header
+            const httpHeaderAccepts: string[] = [
+                'application/json'
+            ];
+            localVarHttpHeaderAcceptSelected = this.configuration.selectHeaderAccept(httpHeaderAccepts);
+        }
+        if (localVarHttpHeaderAcceptSelected !== undefined) {
+            localVarHeaders = localVarHeaders.set('Accept', localVarHttpHeaderAcceptSelected);
+        }
+
+        let localVarHttpContext: HttpContext | undefined = options && options.context;
+        if (localVarHttpContext === undefined) {
+            localVarHttpContext = new HttpContext();
+        }
+
+
+        let responseType_: 'text' | 'json' = 'json';
+        if(localVarHttpHeaderAcceptSelected && localVarHttpHeaderAcceptSelected.startsWith('text')) {
+            responseType_ = 'text';
+        }
+
+        return this.httpClient.delete<SimpleStatusResponse>(`${this.configuration.basePath}/tasks/${encodeURIComponent(String(taskID))}/subtasks`,
+            {
+                context: localVarHttpContext,
+                responseType: <any>responseType_,
+                withCredentials: this.configuration.withCredentials,
+                headers: localVarHeaders,
+                observe: observe,
+                reportProgress: reportProgress
+            }
+        );
+    }
+
     /**
      * @param taskID internal id of task
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
diff --git a/frontend/src/app/tasks/clear-task-dialog/clear-task-dialog.component.ts b/frontend/src/app/tasks/clear-task-dialog/clear-task-dialog.component.ts
index 86c8af5..400dd26 100644
--- a/frontend/src/app/tasks/clear-task-dialog/clear-task-dialog.component.ts
+++ b/frontend/src/app/tasks/clear-task-dialog/clear-task-dialog.component.ts
@@ -1,12 +1,14 @@
 import {Component, Inject, OnInit} from '@angular/core';
 import {TaskEditorData} from "../task-editor/TaskEditorData";
-import {TaskEntityInfo, TaskgroupService} from "../../../api";
+import {TaskEntityInfo, TaskgroupService, TaskService} from "../../../api";
 import {MAT_DIALOG_DATA, MatDialogRef} from "@angular/material/dialog";
 import {MatSnackBar} from "@angular/material/snack-bar";
 
 export interface ClearTaskDialogData {
-  taskgroupID: number,
-  tasks: TaskEntityInfo[]
+  taskgroupID: number | undefined,
+  parentTaskID: number | undefined
+  tasks: TaskEntityInfo[],
+  subtasks: boolean
 }
 @Component({
   selector: 'app-clear-task-dialog',
@@ -23,7 +25,8 @@ export class ClearTaskDialogComponent implements OnInit{
   constructor(@Inject(MAT_DIALOG_DATA) public editorData: ClearTaskDialogData,
               private taskgroupService: TaskgroupService,
               private dialogRef: MatDialogRef<ClearTaskDialogComponent>,
-              private snackbar: MatSnackBar) {
+              private snackbar: MatSnackBar,
+              private taskService: TaskService) {
   }
 
   ngOnInit(): void {
@@ -48,22 +51,43 @@ export class ClearTaskDialogComponent implements OnInit{
   }
 
   clearTasks() {
-    this.taskgroupService.taskgroupsTaskgroupIDClearDelete(this.editorData.taskgroupID).subscribe({
-      next: resp => {
-        if(resp.status == "success") {
-          const deletedTasks = this.editorData.tasks;
-          this.dialogRef.close(deletedTasks);
+    if(this.editorData.subtasks) {
+      this.taskService.tasksTaskIDSubtasksDelete(this.editorData.parentTaskID!).subscribe({
+        next: resp => {
+          if(resp.status == "success") {
+            const deletedTasks = this.editorData.tasks;
+            this.dialogRef.close(deletedTasks);
+          }
+        },
+        error: err => {
+          if(err.status == 403) {
+            this.snackbar.open("No permission", "", {duration: 2000});
+          } else if(err.status == 404) {
+            this.snackbar.open("Not found", "", {duration: 2000});
+          } else {
+            this.snackbar.open("Unexpected error", "", {duration: 2000});
+          }
         }
-      },
-      error: err => {
-        if(err.status == 403) {
-          this.snackbar.open("No permission", "", {duration: 2000});
-        } else if(err.status == 404) {
-          this.snackbar.open("Not found", "", {duration: 2000});
-        } else {
-          this.snackbar.open("Unexpected error", "", {duration: 2000});
+      })
+    } else {
+      this.taskgroupService.taskgroupsTaskgroupIDClearDelete(this.editorData.taskgroupID!).subscribe({
+        next: resp => {
+          if(resp.status == "success") {
+            const deletedTasks = this.editorData.tasks;
+            this.dialogRef.close(deletedTasks);
+          }
+        },
+        error: err => {
+          if(err.status == 403) {
+            this.snackbar.open("No permission", "", {duration: 2000});
+          } else if(err.status == 404) {
+            this.snackbar.open("Not found", "", {duration: 2000});
+          } else {
+            this.snackbar.open("Unexpected error", "", {duration: 2000});
+          }
         }
-      }
-    })
+      })
+    }
+
   }
 }
diff --git a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts
index a961599..18277d3 100644
--- a/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts
+++ b/frontend/src/app/tasks/task-dashboard/task-dashboard.component.ts
@@ -20,7 +20,7 @@ import {TaskWeeklySeriesCreatorComponent} from "../task-weekly-series-creator/ta
 })
 export class TaskDashboardComponent implements OnChanges{
   ngOnChanges(): void {
-    if(this.taskgroupID != undefined) {
+    if(this.subTasks.length == 0 && this.taskgroupID != undefined) {
       this.fetchTasks()
     } else if(this.subTasks.length > 0) {
       this.datasource.data = this.subTasks;
@@ -33,6 +33,7 @@ export class TaskDashboardComponent implements OnChanges{
 
   @Input("taskgroupID") taskgroupID: number | undefined
   @Input("subTasks") subTasks: TaskEntityInfo[] = []
+  @Input("parentTaskID") parentTaskID: number | undefined
   @ViewChild(MatPaginator) paginator: MatPaginator | undefined
   @ViewChild(MatSort) sort: MatSort | undefined
 
@@ -111,9 +112,11 @@ export class TaskDashboardComponent implements OnChanges{
   }
 
   clearTasks() {
-    const clearTaskData: ClearTaskDialogData = {
+    let clearTaskData: ClearTaskDialogData = {
       tasks: this.datasource.data,
-      taskgroupID: this.taskgroupID!
+      taskgroupID: this.taskgroupID,
+      parentTaskID: this.parentTaskID,
+      subtasks: this.subTasks.length > 0
     }
     const dialogRef = this.dialog.open(ClearTaskDialogComponent, {data: clearTaskData, width: "600px"});
     dialogRef.afterClosed().subscribe(res => {
diff --git a/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html b/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html
index c530aad..6ab6c82 100644
--- a/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html
+++ b/frontend/src/app/tasks/task-detail-overview/task-detail-overview.component.html
@@ -44,8 +44,8 @@
 
   <mat-expansion-panel *ngIf="subTasks.length > 0" style="margin-top: 20px" expanded>
     <mat-expansion-panel-header>Subtasks</mat-expansion-panel-header>
-    <div>
-      <app-task-dashboard [subTasks]="subTasks"></app-task-dashboard>
+    <div *ngIf="task != undefined">
+      <app-task-dashboard [subTasks]="subTasks" [taskgroupID]="taskgroupID" [parentTaskID]="task!.taskID"></app-task-dashboard>
     </div>
   </mat-expansion-panel>