diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd7f059c30..5310348063 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@
 - Fix: DeepL APIのAPIキー指定方式変更に対応  
   (Cherry-picked from https://github.com/MisskeyIO/misskey/pull/1096)
 	- 内部実装の変更にて対応可能な更新です。Misskey側の設定方法に変更はありません。
+- Fix: DBレプリケーションを利用する環境でクエリーが失敗する問題を修正  
+  (Cherry-picked from https://github.com/MisskeyIO/misskey/pull/1123)
 
 ## 2025.11.0
 
diff --git a/packages/backend/src/models/_.ts b/packages/backend/src/models/_.ts
index 8c77a225c8..c4528e3a77 100644
--- a/packages/backend/src/models/_.ts
+++ b/packages/backend/src/models/_.ts
@@ -5,18 +5,9 @@
 
 import {
 	FindOneOptions,
-	InsertQueryBuilder,
 	ObjectLiteral,
-	QueryRunner,
 	Repository,
-	SelectQueryBuilder,
 } from 'typeorm';
-import { PostgresConnectionOptions } from 'typeorm/driver/postgres/PostgresConnectionOptions.js';
-import { RelationCountLoader } from 'typeorm/query-builder/relation-count/RelationCountLoader.js';
-import { RelationIdLoader } from 'typeorm/query-builder/relation-id/RelationIdLoader.js';
-import {
-	RawSqlResultsToEntityTransformer,
-} from 'typeorm/query-builder/transformer/RawSqlResultsToEntityTransformer.js';
 import { MiAbuseReportNotificationRecipient } from '@/models/AbuseReportNotificationRecipient.js';
 import { MiAbuseUserReport } from '@/models/AbuseUserReport.js';
 import { MiAccessToken } from '@/models/AccessToken.js';
@@ -96,66 +87,12 @@ import { MiWebhook } from '@/models/Webhook.js';
 import type { QueryDeepPartialEntity } from 'typeorm/query-builder/QueryPartialEntity.js';
 
 export interface MiRepository<T extends ObjectLiteral> {
-	createTableColumnNames(this: Repository<T> & MiRepository<T>): string[];
-
 	insertOne(this: Repository<T> & MiRepository<T>, entity: QueryDeepPartialEntity<T>, findOptions?: Pick<FindOneOptions<T>, 'relations'>): Promise<T>;
-
-	insertOneImpl(this: Repository<T> & MiRepository<T>, entity: QueryDeepPartialEntity<T>, findOptions?: Pick<FindOneOptions<T>, 'relations'>, queryRunner?: QueryRunner): Promise<T>;
-
-	selectAliasColumnNames(this: Repository<T> & MiRepository<T>, queryBuilder: InsertQueryBuilder<T>, builder: SelectQueryBuilder<T>): void;
 }
 
 export const miRepository = {
-	createTableColumnNames() {
-		return this.metadata.columns.filter(column => column.isSelect && !column.isVirtual).map(column => column.databaseName);
-	},
 	async insertOne(entity, findOptions?) {
-		const opt = this.manager.connection.options as PostgresConnectionOptions;
-		if (opt.replication) {
-			const queryRunner = this.manager.connection.createQueryRunner('master');
-			try {
-				return this.insertOneImpl(entity, findOptions, queryRunner);
-			} finally {
-				await queryRunner.release();
-			}
-		} else {
-			return this.insertOneImpl(entity, findOptions);
-		}
-	},
-	async insertOneImpl(entity, findOptions?, queryRunner?) {
-		// ---- insert + returningの結果を共通テーブル式(CTE)に保持するクエリを生成 ----
-
-		const queryBuilder = this.createQueryBuilder().insert().values(entity);
-		// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-		const mainAlias = queryBuilder.expressionMap.mainAlias!;
-		const name = mainAlias.name;
-		mainAlias.name = 't';
-		const columnNames = this.createTableColumnNames();
-		queryBuilder.returning(columnNames.reduce((a, c) => `${a}, ${queryBuilder.escape(c)}`, '').slice(2));
-
-		// ---- 共通テーブル式(CTE)から結果を取得 ----
-		const builder = this.createQueryBuilder(undefined, queryRunner).addCommonTableExpression(queryBuilder, 'cte', { columnNames });
-		// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-		builder.expressionMap.mainAlias!.tablePath = 'cte';
-		this.selectAliasColumnNames(queryBuilder, builder);
-		if (findOptions) {
-			builder.setFindOptions(findOptions);
-		}
-		const raw = await builder.execute();
-		mainAlias.name = name;
-		const relationId = await new RelationIdLoader(builder.connection, this.queryRunner, builder.expressionMap.relationIdAttributes).load(raw);
-		const relationCount = await new RelationCountLoader(builder.connection, this.queryRunner, builder.expressionMap.relationCountAttributes).load(raw);
-		const result = new RawSqlResultsToEntityTransformer(builder.expressionMap, builder.connection.driver, relationId, relationCount, this.queryRunner).transform(raw, mainAlias);
-		return result[0];
-	},
-	selectAliasColumnNames(queryBuilder, builder) {
-		let selectOrAddSelect = (selection: string, selectionAliasName?: string) => {
-			selectOrAddSelect = (selection, selectionAliasName) => builder.addSelect(selection, selectionAliasName);
-			return builder.select(selection, selectionAliasName);
-		};
-		for (const columnName of this.createTableColumnNames()) {
-			selectOrAddSelect(`${builder.alias}.${columnName}`, `${builder.alias}_${columnName}`);
-		}
+		return await this.insert(entity).then(x => this.findOneOrFail({ where: x.identifiers[0], ...findOptions }));
 	},
 } satisfies MiRepository<ObjectLiteral>;