diff --git a/apps/www/src/client/App.tsx b/apps/www/src/client/App.tsx
index 146bdba..96a0526 100644
--- a/apps/www/src/client/App.tsx
+++ b/apps/www/src/client/App.tsx
@@ -1397,6 +1397,7 @@ function StaffPlayerActions({ account, navigate }: { account: PublicAccount; nav
 	// One message for every box sent from this card; it stays put between sends.
 	const [message, setMessage] = useState('')
 	const [confirmingClear, setConfirmingClear] = useState(false)
+	const [confirmingDorm, setConfirmingDorm] = useState(false)
 	const [itemId, setItemId] = useState('')
 	const [xp, setXp] = useState('')
 	const gift = useAction()
@@ -1404,6 +1405,7 @@ function StaffPlayerActions({ account, navigate }: { account: PublicAccount; nav
 	const itemGift = useAction()
 	const usernameChange = useAction()
 	const clearPassword = useAction()
+	const clearDorm = useAction()
 	const grantPlus = useAction()
 	const base = `/api/staff/players/${account.accountId}`
 
@@ -1626,6 +1628,41 @@ function StaffPlayerActions({ account, navigate }: { account: PublicAccount; nav
 						Clear password
 					</button>
 				)}
+				{confirmingDorm ? (
+					<>
+						<button
+							type="submit"
+							disabled={clearDorm.pending}
+							onClick={() =>
+								void clearDorm.run(async () => {
+									const res = await call<{ previousSaveId: number | null; saveId: number | null }>(
+										`${base}/clear-dorm`,
+										{ authed: true, method: 'POST' }
+									)
+									setConfirmingDorm(false)
+									if (res.previousSaveId === null)
+										return `@${account.username}'s dorm has never been saved.`
+									if (res.saveId === null) return `@${account.username}'s dorm is already empty.`
+									return `Dorm cleared: @${account.username}'s dorm loads empty now (save ${res.saveId}). Their old dorm is kept as save ${res.previousSaveId}.`
+								})
+							}
+						>
+							{clearDorm.pending ? 'Clearing…' : 'Confirm clear dorm'}
+						</button>
+						<button
+							type="button"
+							className="linkish"
+							disabled={clearDorm.pending}
+							onClick={() => setConfirmingDorm(false)}
+						>
+							Cancel
+						</button>
+					</>
+				) : (
+					<button type="submit" onClick={() => setConfirmingDorm(true)}>
+						Clear dorm
+					</button>
+				)}
 				<button
 					type="submit"
 					onClick={() =>
@@ -1639,10 +1676,17 @@ function StaffPlayerActions({ account, navigate }: { account: PublicAccount; nav
 				<strong>Clear password:</strong> Only use if the player has requested a password clear and
 				they can still login via Steam or Meta.
 			</p>
+			<p className="hint">
+				<strong>Clear dorm:</strong> Empties the player&apos;s dorm so it loads in the 2023 client
+				again — a dorm saved in a newer client won&apos;t. It publishes a new, empty save; the old
+				one stays in the dorm&apos;s save history and can be restored.
+			</p>
 			{usernameChange.error && <p className="error">{usernameChange.error}</p>}
 			{usernameChange.done && <p className="ok">{usernameChange.done}</p>}
 			{clearPassword.error && <p className="error">{clearPassword.error}</p>}
 			{clearPassword.done && <p className="ok">{clearPassword.done}</p>}
+			{clearDorm.error && <p className="error">{clearDorm.error}</p>}
+			{clearDorm.done && <p className="ok">{clearDorm.done}</p>}
 			{grantPlus.error && <p className="error">{grantPlus.error}</p>}
 			{grantPlus.done && <p className="ok">{grantPlus.done}</p>}
 		</section>
diff --git a/apps/www/src/staff.ts b/apps/www/src/staff.ts
index 6382712..84d07bb 100644
--- a/apps/www/src/staff.ts
+++ b/apps/www/src/staff.ts
@@ -1,6 +1,7 @@
 import {
 	addUsernameChange,
 	addXp,
+	clearDormSaveBlob,
 	clearPasswordHash,
 	createGift,
 	getAccount,
@@ -1532,6 +1533,25 @@ export async function clearPasswordHandler(c: Context<App>) {
 	return c.json({ playerId, hadPassword })
 }
 
+/**
+ * Blank the scene on a player's dorm, for a player going back to the 2023 client: a dorm
+ * saved by a newer one won't load there. It publishes a new, empty save rather than erasing
+ * anything, so `previousSaveId` is the save to restore if they want the old dorm back.
+ * `saveId` is null when there was nothing to clear, which writes nothing and is still
+ * logged; a player with no dorm at all is a 404.
+ */
+export async function clearDormHandler(c: Context<App>) {
+	const playerId = playerIdParam(c)
+	if (playerId === null) return c.json({ error: 'A numeric player id is required' }, 400)
+
+	const cleared = await clearDormSaveBlob(c.env.DB, playerId)
+	if (cleared === null) return c.json({ error: 'That player has no dorm' }, 404)
+
+	await recordPlayerAudit(c, 'clear_dorm', { playerId, ...cleared })
+	logger.info('staff cleared a dorm', { moderatorId: staffId(c), playerId, ...cleared })
+	return c.json({ playerId, ...cleared })
+}
+
 /**
  * Give a player Rec Room Plus by setting `hasPlus` on their account — the same flag the
  * Discord benefits claim and `runx admin grant-plus` set, with no Discord link involved.
diff --git a/apps/www/src/test/integration/api.test.ts b/apps/www/src/test/integration/api.test.ts
index cf7a1e1..4fdff73 100644
--- a/apps/www/src/test/integration/api.test.ts
+++ b/apps/www/src/test/integration/api.test.ts
@@ -25,7 +25,7 @@ import { getProgression, PROGRESSION_SCHEMA_DDL } from '@repo/domain/src/progres
 import { ROOM_INSTANCE_SCHEMA_DDL } from '@repo/domain/src/room-instance-db'
 // Banning a player moves them into their own dorm, which is a room (created on demand) with
 // a subroom — so those tables have to be here, as they are on the shared database.
-import { ROOM_SCHEMA_DDL, SUBROOM_SCHEMA_DDL } from '@repo/domain/src/rooms-db'
+import { getOrCreateDormRoom, ROOM_SCHEMA_DDL, SUBROOM_SCHEMA_DDL } from '@repo/domain/src/rooms-db'
 import { recordStat, STAT_SCHEMA_DDL } from '@repo/domain/src/stats-db'
 import { generateToken } from '@repo/jwt'
 
@@ -871,6 +871,7 @@ it('refuses every staff endpoint without a token, and without a staff role', asy
 		'/api/staff/players/1/gift-xp',
 		'/api/staff/players/1/username-changes',
 		'/api/staff/players/1/clear-password',
+		'/api/staff/players/1/clear-dorm',
 		'/api/staff/studio-access',
 		'/api/staff/players/1/grant-plus',
 	]
@@ -2140,6 +2141,87 @@ it('clears a player’s password so they can set a new one in game', async () =>
 	expect((await staffPost('/api/staff/players/8397/clear-password', 8110, {})).status).toBe(404)
 })
 
+it('clears a player’s dorm by publishing an empty save over the newest one', async () => {
+	await updateAccount(env.DB, 8340, { username: 'Timetraveler' })
+	expect((await staffPost('/api/staff/players/8340/clear-dorm', 8110, {})).status).toBe(404)
+
+	const dorm = await getOrCreateDormRoom(env.DB, 8340)
+	const roomId = Number(dorm.RoomId)
+	const { sub_room_id: subRoomId } = (await env.DB.prepare(
+		'SELECT sub_room_id FROM subroom WHERE room_id = ?1 LIMIT 1'
+	)
+		.bind(roomId)
+		.first<{ sub_room_id: number }>())!
+
+	// A dorm that has never been saved: nothing to clear, still a success.
+	let res = await staffPost('/api/staff/players/8340/clear-dorm', 8110, {})
+	expect(await res.json()).toEqual({ playerId: 8340, roomId, previousSaveId: null, saveId: null })
+
+	const insertSave = (blob: string) =>
+		env.DB.prepare(
+			'INSERT INTO subroom_save (sub_room_id, data) VALUES (?1, ?2) RETURNING sub_room_data_save_id AS id'
+		)
+			.bind(
+				subRoomId,
+				JSON.stringify({
+					DataBlob: blob,
+					DataBlobHash: 'hash',
+					Description: blob,
+					PersistenceVersion: 7,
+					CreatedAt: '2025-08-01T00:00:00.000Z',
+				})
+			)
+			.first<{ id: number }>()
+	const older = (await insertSave('old.blob'))!.id
+	const newer = (await insertSave('new.blob'))!.id
+	await env.DB.prepare(
+		'UPDATE subroom SET current_save_id = ?2, staged_save_id = ?2 WHERE sub_room_id = ?1'
+	)
+		.bind(subRoomId, newer)
+		.run()
+	const saveData = async (id: number) =>
+		JSON.parse(
+			(await env.DB.prepare('SELECT data FROM subroom_save WHERE sub_room_data_save_id = ?1')
+				.bind(id)
+				.first<{ data: string }>())!.data
+		)
+	const pointers = () =>
+		env.DB.prepare('SELECT current_save_id, staged_save_id FROM subroom WHERE sub_room_id = ?1')
+			.bind(subRoomId)
+			.first<{ current_save_id: number; staged_save_id: number | null }>()
+
+	res = await staffPost('/api/staff/players/8340/clear-dorm', 8110, {})
+	expect(res.status).toBe(200)
+	const { saveId } = (await res.json()) as { saveId: number }
+	expect(saveId).toBeGreaterThan(newer)
+
+	// The blank save copies the newest one but for the blob, and goes live.
+	const blank = await saveData(saveId)
+	expect(blank).toEqual({
+		DataBlob: '',
+		DataBlobHash: null,
+		Description: 'Cleared by staff',
+		PersistenceVersion: 7,
+		CreatedAt: expect.any(String),
+	})
+	expect(blank.CreatedAt).not.toBe('2025-08-01T00:00:00.000Z')
+	expect(await pointers()).toEqual({ current_save_id: saveId, staged_save_id: null })
+	// Nothing is erased: both earlier saves are as they were.
+	expect((await saveData(newer)).DataBlob).toBe('new.blob')
+	expect((await saveData(older)).DataBlob).toBe('old.blob')
+
+	// Clearing an already-empty dorm writes nothing more.
+	res = await staffPost('/api/staff/players/8340/clear-dorm', 8110, {})
+	expect(await res.json()).toEqual({ playerId: 8340, roomId, previousSaveId: saveId, saveId: null })
+	expect(await pointers()).toEqual({ current_save_id: saveId, staged_save_id: null })
+
+	expect((await auditRows('clear_dorm', 8340)).map((r) => r.data)).toEqual([
+		{ playerId: 8340, roomId, previousSaveId: null, saveId: null },
+		{ playerId: 8340, roomId, previousSaveId: newer, saveId },
+		{ playerId: 8340, roomId, previousSaveId: saveId, saveId: null },
+	])
+})
+
 it('grants a player Plus, developers only', async () => {
 	await updateAccount(env.DB, 8330, { username: 'Plusless' })
 	const hasPlus = async () =>
diff --git a/apps/www/src/www.app.ts b/apps/www/src/www.app.ts
index 5e9437f..f7b2c6b 100644
--- a/apps/www/src/www.app.ts
+++ b/apps/www/src/www.app.ts
@@ -43,6 +43,7 @@ import {
 	addUsernameChangeHandler,
 	banReportHandler,
 	bansInForceHandler,
+	clearDormHandler,
 	clearPasswordHandler,
 	createReportHandler,
 	getReportHandler,
@@ -610,6 +611,8 @@ const app = new Hono<App>()
 	.post('/api/staff/players/:id/grant-plus', requireDeveloper, grantPlusHandler)
 	.post('/api/staff/players/:id/username-changes', addUsernameChangeHandler)
 	.post('/api/staff/players/:id/clear-password', clearPasswordHandler)
+	// Blanks the dorm's newest save so a player can go back to the 2023 client.
+	.post('/api/staff/players/:id/clear-dorm', clearDormHandler)
 	// The signed-in staff member's OWN sandbox flag: read it, and opt in or out. Self-only,
 	// so plain staff (not developer-only) — it moves nobody but the caller, and `match`
 	// honours it on their next room join.
diff --git a/packages/domain/src/rooms-db.ts b/packages/domain/src/rooms-db.ts
index d7eb473..4d931c1 100644
--- a/packages/domain/src/rooms-db.ts
+++ b/packages/domain/src/rooms-db.ts
@@ -3982,6 +3982,64 @@ export async function getDormRoom(db: D1Database, accountId: number): Promise<Ro
 	)
 }
 
+/**
+ * Blank the scene on a player's dorm by publishing a NEW save with an empty `DataBlob` (and a
+ * null `DataBlobHash`) on top of the dorm's most recent one. A dorm saved by a newer client
+ * won't load in the 2023 one, and this puts it back to the empty dorm. Nothing is erased: the
+ * new save copies every other field of the newest one, and that save stays in the history, so
+ * `publish_save` with `previousSaveId` restores the dorm as it was.
+ *
+ * Dorms always publish, so the newest save is the one `CurrentSave` serves, and the new save
+ * goes live the same way — `current_save_id`, with any staged save dropped.
+ *
+ * Null when the player has no dorm. `previousSaveId` is the newest save beforehand (null when
+ * the dorm has never been saved); `saveId` is the blank save made here, null when there was
+ * no blob to clear and so nothing was written.
+ */
+export async function clearDormSaveBlob(
+	db: D1Database,
+	accountId: number
+): Promise<{ roomId: number; previousSaveId: number | null; saveId: number | null } | null> {
+	const dorm = await db
+		.prepare('SELECT room_id FROM room WHERE creator_account_id = ?1 AND is_dorm = 1 LIMIT 1')
+		.bind(accountId)
+		.first<{ room_id: number }>()
+	if (!dorm) return null
+
+	const latest = await db
+		.prepare(
+			`SELECT s.sub_room_data_save_id AS id, s.sub_room_id AS subRoomId,
+			        json_extract(s.data, '$.DataBlob') AS blob
+			   FROM subroom_save s JOIN subroom r ON r.sub_room_id = s.sub_room_id
+			  WHERE r.room_id = ?1
+			  ORDER BY s.sub_room_data_save_id DESC LIMIT 1`
+		)
+		.bind(dorm.room_id)
+		.first<{ id: number; subRoomId: number; blob: string | null }>()
+	if (!latest || !latest.blob) {
+		return { roomId: dorm.room_id, previousSaveId: latest?.id ?? null, saveId: null }
+	}
+
+	const save = await db
+		.prepare(
+			`INSERT INTO subroom_save (sub_room_id, data)
+			 SELECT sub_room_id, json_set(data, '$.DataBlob', '', '$.DataBlobHash', NULL,
+			                              '$.Description', 'Cleared by staff', '$.CreatedAt', ?2)
+			   FROM subroom_save WHERE sub_room_data_save_id = ?1
+			 RETURNING sub_room_data_save_id AS id`
+		)
+		.bind(latest.id, new Date().toISOString())
+		.first<{ id: number }>()
+	if (!save) return { roomId: dorm.room_id, previousSaveId: latest.id, saveId: null }
+	await db
+		.prepare(
+			'UPDATE subroom SET current_save_id = ?2, staged_save_id = NULL WHERE sub_room_id = ?1'
+		)
+		.bind(latest.subRoomId, save.id)
+		.run()
+	return { roomId: dorm.room_id, previousSaveId: latest.id, saveId: save.id }
+}
+
 /**
  * The player's personal dorm room, created on first access. Cloned from the
  * seeded template dorm (RoomId 1) but owned by the player and flagged IsDorm — so