diff --git a/frontend/src/app/assignment/modules/solution/feedback/feedback.component.ts b/frontend/src/app/assignment/modules/solution/feedback/feedback.component.ts
index ecb619f3a..180b2eaca 100644
--- a/frontend/src/app/assignment/modules/solution/feedback/feedback.component.ts
+++ b/frontend/src/app/assignment/modules/solution/feedback/feedback.component.ts
@@ -1,4 +1,4 @@
-import { Component } from '@angular/core';
+import {Component, OnInit} from '@angular/core';
 import Solution, {Feedback} from "../../../model/solution";
 import {ActivatedRoute} from "@angular/router";
 import {SolutionService} from "../../../services/solution.service";
@@ -10,7 +10,7 @@ import {ToastService} from "@mean-stream/ngbx";
   templateUrl: './feedback.component.html',
   styleUrls: ['./feedback.component.scss']
 })
-export class FeedbackComponent {
+export class FeedbackComponent implements OnInit {
   protected readonly Feedback = Feedback;
 
   feedback: Feedback = {};
diff --git a/frontend/src/app/assignment/modules/solution/snippet-list/snippet-list.component.ts b/frontend/src/app/assignment/modules/solution/snippet-list/snippet-list.component.ts
index b69dd0216..d93021f7d 100644
--- a/frontend/src/app/assignment/modules/solution/snippet-list/snippet-list.component.ts
+++ b/frontend/src/app/assignment/modules/solution/snippet-list/snippet-list.component.ts
@@ -1,4 +1,4 @@
-import {Component, Input, OnInit} from '@angular/core';
+import {Component, Input, OnDestroy, OnInit} from '@angular/core';
 import {CreateEvaluationDto, Snippet} from "../../../model/evaluation";
 import {merge, Observable, Subject, Subscription} from "rxjs";
 import {SearchSummary} from "../../../model/search-result";
@@ -18,7 +18,7 @@ export const selectionComment = '(fulibFeedback Selection)';
   templateUrl: './snippet-list.component.html',
   styleUrls: ['./snippet-list.component.scss']
 })
-export class SnippetListComponent implements OnInit {
+export class SnippetListComponent implements OnInit, OnDestroy {
   @Input({required: true}) task?: Task;
   @Input({required: true}) dto: CreateEvaluationDto;
 
diff --git a/services/apps/assignments/src/course/course.service.ts b/services/apps/assignments/src/course/course.service.ts
index e6c847a46..4c43fdd79 100644
--- a/services/apps/assignments/src/course/course.service.ts
+++ b/services/apps/assignments/src/course/course.service.ts
@@ -2,7 +2,7 @@ import {EventService} from '@mean-stream/nestx';
 import {Injectable} from '@nestjs/common';
 import {InjectModel} from '@nestjs/mongoose';
 import {FilterQuery, Model} from 'mongoose';
-import {AuthorInfo, Solution} from '../solution/solution.schema';
+import {AuthorInfo} from '../solution/solution.schema';
 import {SolutionService} from '../solution/solution.service';
 import {idFilter} from '../utils';
 import {CourseStudent, CreateCourseDto, UpdateCourseDto} from './course.dto';
diff --git a/services/libs/member/src/member.schema.ts b/services/libs/member/src/member.schema.ts
index f78d9d6e9..bbe33dce3 100644
--- a/services/libs/member/src/member.schema.ts
+++ b/services/libs/member/src/member.schema.ts
@@ -2,7 +2,6 @@ import {Ref} from '@mean-stream/nestx';
 import {Prop, Schema, SchemaFactory} from '@nestjs/mongoose';
 import {ApiProperty} from '@nestjs/swagger';
 import {Document, Types} from 'mongoose';
-import {Project} from '../../../apps/projects/src/project/project.schema';
 
 @Schema({_id: false, id: false})
 export class Member {