diff --git a/packages/backend/src/core/NoteEditService.ts b/packages/backend/src/core/NoteEditService.ts
index 6062e464ba..9e8bb8b4fd 100644
--- a/packages/backend/src/core/NoteEditService.ts
+++ b/packages/backend/src/core/NoteEditService.ts
@@ -118,7 +118,7 @@ type MinimumUser = {
 	uri: MiUser['uri'];
 };
 
-type Option = {
+export type Option = {
 	createdAt?: Date | null;
 	name?: string | null;
 	text?: string | null;
diff --git a/packages/backend/src/server/api/endpoints/admin/cw-note.ts b/packages/backend/src/server/api/endpoints/admin/cw-note.ts
index a549f57fb3..ba2240b8b2 100644
--- a/packages/backend/src/server/api/endpoints/admin/cw-note.ts
+++ b/packages/backend/src/server/api/endpoints/admin/cw-note.ts
@@ -4,11 +4,14 @@
  */
 
 import { Inject, Injectable } from '@nestjs/common';
+import { In } from 'typeorm';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import type { MiNote, MiUser, NotesRepository } from '@/models/_.js';
+import type { ChannelsRepository, DriveFilesRepository, MiNote, NotesRepository } from '@/models/_.js';
 import { DI } from '@/di-symbols.js';
 import { ModerationLogService } from '@/core/ModerationLogService.js';
-import { NoteEditService } from '@/core/NoteEditService.js';
+import { NoteEditService, Option } from '@/core/NoteEditService.js';
+import { CacheService } from '@/core/CacheService.js';
+import { awaitAll } from '@/misc/prelude/await-all.js';
 
 export const meta = {
 	tags: ['admin'],
@@ -35,14 +38,22 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		@Inject(DI.notesRepository)
 		private readonly notesRepository: NotesRepository,
 
+		@Inject(DI.driveFilesRepository)
+		private readonly driveFilesRepository: DriveFilesRepository,
+
+		@Inject(DI.channelsRepository)
+		private readonly channelsRepository: ChannelsRepository,
+
 		private readonly noteEditService: NoteEditService,
 		private readonly moderationLogService: ModerationLogService,
+		private readonly cacheService: CacheService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const note = await this.notesRepository.findOneOrFail({
 				where: { id: ps.noteId },
-				relations: { user: true },
-			}) as MiNote & { user: MiUser };
+				relations: { reply: true, renote: true, channel: true },
+			});
+			const user = await this.cacheService.findUserById(note.userId);
 
 			// Collapse empty strings to null
 			const newCW = ps.cw?.trim() || null;
@@ -51,16 +62,51 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			// Skip if there's nothing to do
 			if (oldCW === newCW) return;
 
-			await this.noteEditService.edit(note.user, note.id, { mandatoryCW: newCW });
+			// TODO remove this after merging hazelnoot/fix-note-edit-logic.
+			//		Until then, we have to ensure that everything is populated just like it would be from notes/edit.ts.
+			//		Otherwise forcing a CW will erase everything else in the note.
+			//		After merging remove all the "createUpdate" stuff and just pass "{ mandatoryCW: newCW }" into noteEditService.edit().
+			const update = await this.createUpdate(note, newCW);
+			await this.noteEditService.edit(user, note.id, update);
 
 			await this.moderationLogService.log(me, 'setMandatoryCWForNote', {
 				newCW,
 				oldCW,
 				noteId: note.id,
-				noteUserId: note.user.id,
-				noteUserUsername: note.user.username,
-				noteUserHost: note.user.host,
+				noteUserId: user.id,
+				noteUserUsername: user.username,
+				noteUserHost: user.host,
 			});
 		});
 	}
+
+	// Note: user must be fetched with reply, renote, and channel relations populated
+	private async createUpdate(note: MiNote, newCW: string | null) {
+		// This is based on the call to NoteEditService.edit from notes/edit endpoint.
+		// noinspection ES6MissingAwait
+		return await awaitAll<Option>({
+			// Preserve these from original note
+			files: note.fileIds.length > 0
+				? this.driveFilesRepository.findBy({ id: In(note.fileIds) }) : null,
+			poll: undefined,
+			text: undefined,
+			cw: undefined,
+			reply: note.reply
+				?? (note.replyId ? this.notesRepository.findOneByOrFail({ id: note.replyId }) : null),
+			renote: note.renote
+				?? (note.renoteId ? this.notesRepository.findOneByOrFail({ id: note.renoteId }) : null),
+			localOnly: note.localOnly,
+			reactionAcceptance: note.reactionAcceptance,
+			visibility: note.visibility,
+			visibleUsers: note.visibleUserIds.length > 0
+				? this.cacheService.getUsers(note.visibleUserIds).then(us => Array.from(us.values())) : null,
+			channel: note.channel ?? (note.channelId ? this.channelsRepository.findOneByOrFail({ id: note.channelId }) : null),
+			apMentions: undefined,
+			apHashtags: undefined,
+			apEmojis: undefined,
+
+			// But override the mandatory CW!
+			mandatoryCW: newCW,
+		});
+	}
 }