diff --git a/fluxer_api/src/api/channel/controllers/MessageController.ts b/fluxer_api/src/api/channel/controllers/MessageController.ts
index 3f80e868a..3833a8c9d 100644
--- a/fluxer_api/src/api/channel/controllers/MessageController.ts
+++ b/fluxer_api/src/api/channel/controllers/MessageController.ts
@@ -333,13 +333,10 @@ export function MessageController(app: HonoApp) {
 			statusCode: 204,
 			security: ['botToken', 'bearerToken', 'sessionToken'],
 			tags: ['Channels', 'Messages'],
-			description:
-				'Clears all read state and acknowledgement records for a channel, marking all messages as unread. Returns 204 No Content on success.',
+			deprecated: true,
+			description: 'Deprecated. Has no effect on the read state. Returns 204 No Content.',
 		}),
 		async (ctx) => {
-			const userId = ctx.get('user').id;
-			const channelId = createChannelID(ctx.req.valid('param').channel_id);
-			await ctx.get('readStateService').deleteReadState({userId, channelId});
 			return ctx.body(null, 204);
 		},
 	);
diff --git a/fluxer_api/src/api/openapi/openapi.json b/fluxer_api/src/api/openapi/openapi.json
index b527ca2fa..35ab09a01 100644
--- a/fluxer_api/src/api/openapi/openapi.json
+++ b/fluxer_api/src/api/openapi/openapi.json
@@ -3030,7 +3030,8 @@
 						"content": {"application/json": {"schema": {"$ref": "#/components/schemas/Error"}}}
 					}
 				},
-				"description": "Clears all read state and acknowledgement records for a channel, marking all messages as unread. Returns 204 No Content on success.",
+				"description": "Deprecated. Has no effect on the read state. Returns 204 No Content.",
+				"deprecated": true,
 				"security": [{"botToken": []}, {"sessionToken": []}],
 				"parameters": [
 					{
diff --git a/fluxer_api/src/api/read_state/ClearChannelReadState.test.ts b/fluxer_api/src/api/read_state/ClearChannelReadState.test.ts
new file mode 100644
index 000000000..7d23645f5
--- /dev/null
+++ b/fluxer_api/src/api/read_state/ClearChannelReadState.test.ts
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {createTestAccount} from '@app/api/auth/tests/AuthTestUtils';
+import {createChannel, createGuild} from '@app/api/guild/tests/GuildTestUtils';
+import {sendMessage} from '@app/api/message/tests/MessageTestUtils';
+import {type ApiTestHarness, createApiTestHarness} from '@app/api/test/ApiTestHarness';
+import {HTTP_STATUS} from '@app/api/test/TestConstants';
+import {createBuilder} from '@app/api/test/TestRequestBuilder';
+import {afterEach, beforeEach, describe, expect, test} from 'vitest';
+
+interface AckResponse {
+	read_states: Array<{
+		id: string;
+		last_message_id: string | null;
+	}>;
+}
+
+describe('DELETE /channels/:channel_id/messages/ack', () => {
+	let harness: ApiTestHarness;
+	beforeEach(async () => {
+		harness = await createApiTestHarness();
+	});
+	afterEach(async () => {
+		await harness?.shutdown();
+	});
+	test('leaves the read state untouched', async () => {
+		const account = await createTestAccount(harness);
+		const guild = await createGuild(harness, account.token, 'Read State Guild');
+		const channel = await createChannel(harness, account.token, guild.id, 'read-state-channel');
+		const older = await sendMessage(harness, account.token, channel.id, 'older');
+		const newer = await sendMessage(harness, account.token, channel.id, 'newer');
+		await createBuilder<AckResponse>(harness, account.token)
+			.post('/read-states/ack')
+			.body({read_states: [{channel_id: channel.id, message_id: newer.id}]})
+			.expect(HTTP_STATUS.OK)
+			.execute();
+		await createBuilder(harness, account.token)
+			.delete(`/channels/${channel.id}/messages/ack`)
+			.expect(HTTP_STATUS.NO_CONTENT)
+			.execute();
+		const response = await createBuilder<AckResponse>(harness, account.token)
+			.post('/read-states/ack')
+			.body({read_states: [{channel_id: channel.id, message_id: older.id}]})
+			.expect(HTTP_STATUS.OK)
+			.execute();
+		expect(response.read_states[0]?.last_message_id).toBe(newer.id);
+	});
+});
diff --git a/fluxer_api/src/api/read_state/IReadStateRepository.ts b/fluxer_api/src/api/read_state/IReadStateRepository.ts
index 724943b1b..8dc9f41c2 100644
--- a/fluxer_api/src/api/read_state/IReadStateRepository.ts
+++ b/fluxer_api/src/api/read_state/IReadStateRepository.ts
@@ -35,8 +35,6 @@ export abstract class IReadStateRepository {
 		}>
 	>;
 
-	abstract deleteReadState(userId: UserID, channelId: ChannelID): Promise<void>;
-
 	abstract bulkAckMessages(
 		userId: UserID,
 		readStates: Array<{
diff --git a/fluxer_api/src/api/read_state/ReadStateRepository.ts b/fluxer_api/src/api/read_state/ReadStateRepository.ts
index 29972c158..c526f0f6d 100644
--- a/fluxer_api/src/api/read_state/ReadStateRepository.ts
+++ b/fluxer_api/src/api/read_state/ReadStateRepository.ts
@@ -4,7 +4,6 @@ import type {ChannelID, MessageID, UserID} from '@app/api/BrandedTypes';
 import {channelIdToMessageId} from '@app/api/BrandedTypes';
 import {
 	BatchBuilder,
-	deleteOneOrMany,
 	fetchMany,
 	fetchManyInChunks,
 	fetchOne,
@@ -199,15 +198,6 @@ export class ReadStateRepository implements IReadStateRepository {
 		return appliedUpdates;
 	}
 
-	async deleteReadState(userId: UserID, channelId: ChannelID): Promise<void> {
-		await deleteOneOrMany(
-			ReadStates.deleteByPk({
-				user_id: userId,
-				channel_id: channelId,
-			}),
-		);
-	}
-
 	async bulkAckMessages(
 		userId: UserID,
 		readStates: Array<{
diff --git a/fluxer_api/src/api/read_state/ReadStateService.ts b/fluxer_api/src/api/read_state/ReadStateService.ts
index d401624d8..d70e34513 100644
--- a/fluxer_api/src/api/read_state/ReadStateService.ts
+++ b/fluxer_api/src/api/read_state/ReadStateService.ts
@@ -141,10 +141,6 @@ export class ReadStateService {
 		}
 	}
 
-	async deleteReadState({userId, channelId}: {userId: UserID; channelId: ChannelID}): Promise<void> {
-		await this.repository.deleteReadState(userId, channelId);
-	}
-
 	async incrementMentionCount({
 		userId,
 		channelId,