error: Some CKEditor 5 modules are duplicated - plugins

Question

I am working in a angular project and using plugin in my project and getting this error:
error: Some CKEditor 5 modules are duplicated. I imported the package #ckeditor/ckeditor5-alignment.
.html file -
<ckeditor #editor [editor]="editor" [config]="config"></ckeditor>
and .ts file
import * as ClassicEditor from '#ckeditor/ckeditor5-build-classic';
import Alignment from '#ckeditor/ckeditor5-alignment/src/alignment';
export class WelcomePageSettingComponent implements OnInit {
public editor = ClassicEditor;
public config = {
plugins: [Alignment],
toolbar: ['heading', '|', 'bold', 'italic', '|', 'alignment'] }; constructor() {
}
constructor() { }
ngOnInit() { }
}

Answer 1

I used ckeditor5-editor-classic instead of ckeditor5-build-classic and getting another error: Cannot read property 'getAttribute' of null.
.html file
<ckeditor [editor]="editor"></ckeditor>
.ts file
import Alignment from '#ckeditor/ckeditor5-alignment/src/alignment';
import ClassicEditor from "#ckeditor/ckeditor5-editor-classic/src/classiceditor";
export class WelcomePageSettingComponent implements OnInit {
public editor = ClassicEditor;
constructor() { }
ngOnInit() {
ClassicEditor
.create(document.querySelector('#editor'), {
plugins: [Alignment],
toolbar: ['heading', '|', 'bold', '|', 'italic', '|', 'mediaEmbed', '|',
'alignment']
})
.then()
.catch();
}
}