diff --git a/packages/backend/src/core/AccountMoveService.ts b/packages/backend/src/core/AccountMoveService.ts
index 122d0d3389..5f88da983c 100644
--- a/packages/backend/src/core/AccountMoveService.ts
+++ b/packages/backend/src/core/AccountMoveService.ts
@@ -9,6 +9,7 @@ import { IsNull, In, MoreThan, Not } from 'typeorm';
 import { bindThis } from '@/decorators.js';
 import { DI } from '@/di-symbols.js';
 import type { MiLocalUser, MiRemoteUser, MiUser } from '@/models/User.js';
+import { isLocalUser } from '@/models/User.js';
 import type { BlockingsRepository, FollowingsRepository, InstancesRepository, MiMeta, MutingsRepository, UserListMembershipsRepository, UsersRepository, NoteScheduleRepository, MiNoteSchedule } from '@/models/_.js';
 import type { RelationshipJobData, ThinUser } from '@/queue/types.js';
 
@@ -33,6 +34,7 @@ import { InternalEventService } from '@/global/InternalEventService.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import type Logger from '@/logger.js';
 import { renderInlineError } from '@/misc/render-inline-error.js';
+import { IdentifiableError } from '@/misc/identifiable-error.js';
 import type { Packed } from '@/misc/json-schema.js';
 import type { Config } from '@/config.js';
 
@@ -91,6 +93,23 @@ export class AccountMoveService {
 		this.logger = this.loggerService.getLogger('account-move');
 	}
 
+	@bindThis
+	public async restartMigration(src: MiUser): Promise<void> {
+		if (!src.movedToUri) {
+			throw new IdentifiableError('ddcf173a-00f2-4aa4-ba12-cddd131bacf4', `Can't restart migrated for user ${src.id}: user has not migrated`);
+		}
+
+		const dst = await this.apPersonService.resolvePerson(src.movedToUri);
+		this.logger.info(`Restarting migration from ${src.id} (@${src.usernameLower}@${src.host ?? this.config.host}) to ${dst.id} (@${dst.usernameLower}@${dst.host ?? this.config.host})`);
+
+		if (isLocalUser(src)) {
+			// This calls createMoveJob at the end
+			await this.moveFromLocal(src, dst);
+		} else {
+			await this.queueService.createMoveJob(src, dst);
+		}
+	}
+
 	/**
 	 * Move a local account to a new account.
 	 *
diff --git a/packages/backend/src/models/json-schema/user.ts b/packages/backend/src/models/json-schema/user.ts
index 69e81c7448..fdb038d3ce 100644
--- a/packages/backend/src/models/json-schema/user.ts
+++ b/packages/backend/src/models/json-schema/user.ts
@@ -310,7 +310,7 @@ export const packedUserDetailedNotMeOnlySchema = {
 		},
 		movedTo: {
 			type: 'string',
-			format: 'uri',
+			format: 'id',
 			nullable: true, optional: false,
 		},
 		alsoKnownAs: {