diff --git a/packages/backend/src/core/chart/core.ts b/packages/backend/src/core/chart/core.ts
index f40bdf3d73..af5485a46e 100644
--- a/packages/backend/src/core/chart/core.ts
+++ b/packages/backend/src/core/chart/core.ts
@@ -212,8 +212,8 @@ export default abstract class Chart<T extends Schema> {
 	} {
 		const createEntity = (span: 'hour' | 'day'): EntitySchema => new EntitySchema({
 			name:
-				span === 'hour' ? `ChartX${name.replace(/[^a-zA-Z0-9]/g, '')}` :
-				span === 'day' ? `ChartDayX${name.replace(/[^a-zA-Z0-9]/g, '')}` :
+				span === 'hour' ? `ChartX${name}` :
+				span === 'day' ? `ChartDayX${name}` :
 				new Error('not happen') as never,
 			tableName:
 				span === 'hour' ? `__chart__${camelToSnake(name)}` :
diff --git a/packages/backend/src/models/_.ts b/packages/backend/src/models/_.ts
index a639039bef..97da3a20a5 100644
--- a/packages/backend/src/models/_.ts
+++ b/packages/backend/src/models/_.ts
@@ -96,9 +96,10 @@ export const miRepository = {
 		return queryBuilder.expressionMap.insertColumns;
 	},
 	async insertOne(entity, findOptions?) {
-		const queryBuilder = this.createQueryBuilder().insert().values(entity).returning('*');
+		const queryBuilder = this.createQueryBuilder().insert().values(entity);
 		queryBuilder.expressionMap.mainAlias!.name = 't';
-		const columnNames = this.createTableColumnNames(queryBuilder);
+		const columnNames = this.createTableColumnNames(queryBuilder).map(column => `__disambiguation__${column}`);
+		queryBuilder.returning(columnNames.map(column => `"${column.slice('__disambiguation__'.length)}" AS "${column}"`).join());
 		const builder = this.createQueryBuilder().addCommonTableExpression(queryBuilder, 'cte', { columnNames });
 		builder.expressionMap.mainAlias!.tablePath = 'cte';
 		this.selectAliasColumnNames(queryBuilder, builder);
@@ -114,7 +115,7 @@ export const miRepository = {
 			return builder.select(selection, selectionAliasName);
 		};
 		for (const columnName of this.createTableColumnNames(queryBuilder)) {
-			selectOrAddSelect(`${builder.alias}.${columnName}`, `${builder.alias}_${columnName}`);
+			selectOrAddSelect(`"${builder.alias}"."__disambiguation__${columnName}"`, `"${builder.alias}_${columnName}"`);
 		}
 	},
 } satisfies MiRepository<ObjectLiteral>;