diff --git a/package.json b/package.json
index 955255943..1bbc2f7c6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "calckey",
-	"version": "13.0.0-beta8",
+	"version": "13.0.0-beta9",
 	"codename": "aqua",
 	"repository": {
 		"type": "git",
diff --git a/packages/backend/src/server/api/endpoints/i/known-as.ts b/packages/backend/src/server/api/endpoints/i/known-as.ts
index 9038bca37..a7a32aee6 100644
--- a/packages/backend/src/server/api/endpoints/i/known-as.ts
+++ b/packages/backend/src/server/api/endpoints/i/known-as.ts
@@ -1,18 +1,18 @@
-import type { User, UserDetailedNotMeOnly } from '@/models/entities/user.js';
-import { Users } from '@/models/index.js';
-import { resolveUser } from '@/remote/resolve-user.js';
-import acceptAllFollowRequests from '@/services/following/requests/accept-all.js';
-import { publishToFollowers } from '@/services/i/update.js';
-import { publishMainStream } from '@/services/stream.js';
-import { DAY } from '@/const.js';
-import { apiLogger } from '../../logger.js';
-import { UserProfiles } from '@/models/index.js';
-import config from '@/config/index.js';
-import define from '../../define.js';
-import { ApiError } from '../../error.js';
+import type { User, UserDetailedNotMeOnly } from "@/models/entities/user.js";
+import { Users } from "@/models/index.js";
+import { resolveUser } from "@/remote/resolve-user.js";
+import acceptAllFollowRequests from "@/services/following/requests/accept-all.js";
+import { publishToFollowers } from "@/services/i/update.js";
+import { publishMainStream } from "@/services/stream.js";
+import { DAY } from "@/const.js";
+import { apiLogger } from "../../logger.js";
+import { UserProfiles } from "@/models/index.js";
+import config from "@/config/index.js";
+import define from "../../define.js";
+import { ApiError } from "../../error.js";
 
 export const meta = {
-	tags: ['users'],
+	tags: ["users"],
 
 	secure: true,
 	requireCredential: true,
@@ -24,24 +24,29 @@ export const meta = {
 
 	errors: {
 		noSuchUser: {
-			message: 'No such user.',
-			code: 'NO_SUCH_USER',
-			id: 'fcd2eef9-a9b2-4c4f-8624-038099e90aa5',
+			message: "No such user.",
+			code: "NO_SUCH_USER",
+			id: "fcd2eef9-a9b2-4c4f-8624-038099e90aa5",
 		},
 		notRemote: {
-			message: 'User is not remote. You can only migrate to other instances.',
-			code: 'NOT_REMOTE',
-			id: '4362f8dc-731f-4ad8-a694-be2a88922a24',
+			message: "User is not remote. You can only migrate to other instances.",
+			code: "NOT_REMOTE",
+			id: "4362f8dc-731f-4ad8-a694-be2a88922a24",
+		},
+		uriNull: {
+			message: "User ActivityPup URI is null.",
+			code: "URI_NULL",
+			id: "bf326f31-d430-4f97-9933-5d61e4d48a23",
 		},
 	},
 } as const;
 
 export const paramDef = {
-	type: 'object',
+	type: "object",
 	properties: {
-		alsoKnownAs: { type: 'string' },
+		alsoKnownAs: { type: "string" },
 	},
-	required: ['alsoKnownAs'],
+	required: ["alsoKnownAs"],
 } as const;
 
 // eslint-disable-next-line import/no-default-export
@@ -49,30 +54,32 @@ export default define(meta, paramDef, async (ps, user) => {
 	if (!ps.alsoKnownAs) throw new ApiError(meta.errors.noSuchUser);
 
 	let unfiltered: string = ps.alsoKnownAs;
-
-	if (unfiltered.startsWith('@')) unfiltered = unfiltered.substring(1);
-	if (!unfiltered.includes('@')) throw new ApiError(meta.errors.notRemote);
-
-	const userAddress: string[] = unfiltered.split('@');
-
-	const knownAs: UserDetailedNotMeOnly = await resolveUser(userAddress[0], userAddress[1]).catch(e => {
-		apiLogger.warn(`failed to resolve remote user: ${e}`);
-		throw new ApiError(meta.errors.noSuchUser);
-	});
-
-	const profileTo = await UserProfiles.findOneByOrFail({ userId: knownAs.id });
-	let toUrl: string | null = profileTo.url;
-	if(!toUrl) {
-		toUrl = `${config.url}/@${knownAs.username}`;
-	}
-
 	const updates = {} as Partial<User>;
 
-	if (!toUrl) toUrl = '';
-	if (updates.alsoKnownAs == null || updates.alsoKnownAs.length === 0) {
-		updates.alsoKnownAs = [toUrl];
+	if (!unfiltered) {
+		updates.alsoKnownAs = null;
 	} else {
-		updates.alsoKnownAs.push(toUrl);
+		if (unfiltered.startsWith('acct:')) unfiltered = unfiltered.substring(5);
+		if (unfiltered.startsWith("@")) unfiltered = unfiltered.substring(1);
+		if (!unfiltered.includes("@")) throw new ApiError(meta.errors.notRemote);
+
+		const userAddress: string[] = unfiltered.split("@");
+		const knownAs = await resolveUser(userAddress[0], userAddress[1]).catch(
+			(e) => {
+				apiLogger.warn(`failed to resolve remote user: ${e}`);
+				throw new ApiError(meta.errors.noSuchUser);
+			}
+		);
+
+		let toUrl: string | null = knownAs.uri;
+		if (!toUrl) {
+			throw new ApiError(meta.errors.uriNull);
+		}
+		if (updates.alsoKnownAs == null || updates.alsoKnownAs.length === 0) {
+			updates.alsoKnownAs = [toUrl];
+		} else {
+			updates.alsoKnownAs.push(toUrl);
+		}
 	}
 
 	await Users.update(user.id, updates);
@@ -83,7 +90,7 @@ export default define(meta, paramDef, async (ps, user) => {
 	});
 
 	// Publish meUpdated event
-	publishMainStream(user.id, 'meUpdated', iObj);
+	publishMainStream(user.id, "meUpdated", iObj);
 
 	if (user.isLocked === false) {
 		acceptAllFollowRequests(user);
diff --git a/packages/backend/src/server/api/endpoints/i/move.ts b/packages/backend/src/server/api/endpoints/i/move.ts
index bae1cc2ca..5a26d3e3c 100644
--- a/packages/backend/src/server/api/endpoints/i/move.ts
+++ b/packages/backend/src/server/api/endpoints/i/move.ts
@@ -52,6 +52,11 @@ export const meta = {
 			code: 'NO_SUCH_USER',
 			id: 'fcd2eef9-a9b2-4c4f-8624-038099e90aa5',
 		},
+		uriNull: {
+			message: "User ActivityPup URI is null.",
+			code: "URI_NULL",
+			id: "bf326f31-d430-4f97-9933-5d61e4d48a23",
+		},
 	},
 } as const;
 
@@ -81,25 +86,27 @@ export default define(meta, paramDef, async (ps, user) => {
 	if (user.isAdmin) throw new ApiError(meta.errors.adminForbidden);
 
 	let unfiltered: string = ps.moveToAccount;
+	if (!unfiltered) {
+		throw new ApiError(meta.errors.noSuchMoveTarget);
+	}
 
+	if (unfiltered.startsWith('acct:')) unfiltered = unfiltered.substring(5);
 	if (unfiltered.startsWith('@')) unfiltered = unfiltered.substring(1);
 	if (!unfiltered.includes('@')) throw new ApiError(meta.errors.notRemote);
-	const userAddress: string[] = unfiltered.split('@');
 
+	const userAddress: string[] = unfiltered.split('@');
 	const moveTo: User = await resolveUser(userAddress[0], userAddress[1]).catch(e => {
 		apiLogger.warn(`failed to resolve remote user: ${e}`);
 		throw new ApiError(meta.errors.noSuchMoveTarget);
 	});
-	const profileFrom = await UserProfiles.findOneByOrFail({ userId: user.id });
-	let fromUrl: string | null = profileFrom.url;
+	let fromUrl: string | null = user.uri;
 	if(!fromUrl) {
-		fromUrl = `${config.url}/@${user.username}`;
+		throw new ApiError(meta.errors.uriNull);
 	}
 
-	const profileTo = await UserProfiles.findOneByOrFail({ userId: moveTo.id });
-	let toUrl: string | null = profileTo.url;
+	let toUrl: string | null = moveTo.uri;
 	if(!toUrl) {
-		toUrl = `${config.url}/@${moveTo.username}`;
+		throw new ApiError(meta.errors.uriNull);
 	}
 
 	let allowed = false;