diff --git a/packages/backend/src/core/AccountMoveService.ts b/packages/backend/src/core/AccountMoveService.ts
index ed2891113bd2afabdd6d724926392cb6b27664e6..350aa6ba2495b0611910620703af097360b9061d 100644
--- a/packages/backend/src/core/AccountMoveService.ts
+++ b/packages/backend/src/core/AccountMoveService.ts
@@ -180,7 +180,7 @@ export class AccountMoveService {
 			{ muteeId: dst.id, expiresAt: IsNull() },
 		).then(mutings => mutings.map(muting => muting.muterId));
 
-		const newMutings: Map<string, { muterId: string; muteeId: string; createdAt: Date; expiresAt: Date | null; }> = new Map();
+		const newMutings: Map<string, { muterId: string; muteeId: string; expiresAt: Date | null; }> = new Map();
 
 		// 重複しないようにIDを生成
 		const genId = (): string => {
@@ -194,7 +194,6 @@ export class AccountMoveService {
 			if (existingMutingsMuterUserIds.includes(muting.muterId)) continue; // skip if already muted indefinitely
 			newMutings.set(genId(), {
 				...muting,
-				createdAt: new Date(),
 				muteeId: dst.id,
 			});
 		}
@@ -228,7 +227,7 @@ export class AccountMoveService {
 			},
 		}).then(memberships => memberships.map(membership => membership.userListId));
 
-		const newMemberships: Map<string, { createdAt: Date; userId: string; userListId: string; userListUserId: string; }> = new Map();
+		const newMemberships: Map<string, { userId: string; userListId: string; userListUserId: string; }> = new Map();
 
 		// 重複しないようにIDを生成
 		const genId = (): string => {
@@ -241,7 +240,6 @@ export class AccountMoveService {
 		for (const membership of oldMemberships) {
 			if (existingUserListIds.includes(membership.userListId)) continue; // skip if dst exists in this user's list
 			newMemberships.set(genId(), {
-				createdAt: new Date(),
 				userId: dst.id,
 				userListId: membership.userListId,
 				userListUserId: membership.userListUserId,
diff --git a/packages/backend/src/server/api/endpoints/admin/invite/list.ts b/packages/backend/src/server/api/endpoints/admin/invite/list.ts
index a20a51121a11b0341c415dad9fc35d0cbb223333..f25d3fcb33961d7f927cd390bbad4104e3f73330 100644
--- a/packages/backend/src/server/api/endpoints/admin/invite/list.ts
+++ b/packages/backend/src/server/api/endpoints/admin/invite/list.ts
@@ -56,8 +56,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			}
 
 			switch (ps.sort) {
-				case '+createdAt': query.orderBy('ticket.createdAt', 'DESC'); break;
-				case '-createdAt': query.orderBy('ticket.createdAt', 'ASC'); break;
+				case '+createdAt': query.orderBy('ticket.id', 'DESC'); break;
+				case '-createdAt': query.orderBy('ticket.id', 'ASC'); break;
 				case '+usedAt': query.orderBy('ticket.usedAt', 'DESC', 'NULLS LAST'); break;
 				case '-usedAt': query.orderBy('ticket.usedAt', 'ASC', 'NULLS FIRST'); break;
 				default: query.orderBy('ticket.id', 'DESC'); break;
diff --git a/packages/backend/src/server/api/endpoints/admin/show-users.ts b/packages/backend/src/server/api/endpoints/admin/show-users.ts
index e89e1a1490aca846db1eb11447c3c2b7b988b3b3..fc810987d25c36767db57be62732efe412b646bc 100644
--- a/packages/backend/src/server/api/endpoints/admin/show-users.ts
+++ b/packages/backend/src/server/api/endpoints/admin/show-users.ts
@@ -99,8 +99,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			switch (ps.sort) {
 				case '+follower': query.orderBy('user.followersCount', 'DESC'); break;
 				case '-follower': query.orderBy('user.followersCount', 'ASC'); break;
-				case '+createdAt': query.orderBy('user.createdAt', 'DESC'); break;
-				case '-createdAt': query.orderBy('user.createdAt', 'ASC'); break;
+				case '+createdAt': query.orderBy('user.id', 'DESC'); break;
+				case '-createdAt': query.orderBy('user.id', 'ASC'); break;
 				case '+updatedAt': query.orderBy('user.updatedAt', 'DESC', 'NULLS LAST'); break;
 				case '-updatedAt': query.orderBy('user.updatedAt', 'ASC', 'NULLS FIRST'); break;
 				case '+lastActiveDate': query.orderBy('user.lastActiveDate', 'DESC', 'NULLS LAST'); break;
diff --git a/packages/backend/src/server/api/endpoints/drive/files.ts b/packages/backend/src/server/api/endpoints/drive/files.ts
index 6f3a62977f560733b92ed9daceaa28a082d60259..b7e9d12e94e141668bef20923fd2fa2356115cf7 100644
--- a/packages/backend/src/server/api/endpoints/drive/files.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files.ts
@@ -69,8 +69,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			}
 
 			switch (ps.sort) {
-				case '+createdAt': query.orderBy('file.createdAt', 'DESC'); break;
-				case '-createdAt': query.orderBy('file.createdAt', 'ASC'); break;
+				case '+createdAt': query.orderBy('file.id', 'DESC'); break;
+				case '-createdAt': query.orderBy('file.id', 'ASC'); break;
 				case '+name': query.orderBy('file.name', 'DESC'); break;
 				case '-name': query.orderBy('file.name', 'ASC'); break;
 				case '+size': query.orderBy('file.size', 'DESC'); break;
diff --git a/packages/backend/src/server/api/endpoints/hashtags/users.ts b/packages/backend/src/server/api/endpoints/hashtags/users.ts
index 1cef76d3d23959b6f1f092de047c411f4faa56ce..50aea79943cea85d465ee311d49d250f57fd4dcf 100644
--- a/packages/backend/src/server/api/endpoints/hashtags/users.ts
+++ b/packages/backend/src/server/api/endpoints/hashtags/users.ts
@@ -66,8 +66,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			switch (ps.sort) {
 				case '+follower': query.orderBy('user.followersCount', 'DESC'); break;
 				case '-follower': query.orderBy('user.followersCount', 'ASC'); break;
-				case '+createdAt': query.orderBy('user.createdAt', 'DESC'); break;
-				case '-createdAt': query.orderBy('user.createdAt', 'ASC'); break;
+				case '+createdAt': query.orderBy('user.id', 'DESC'); break;
+				case '-createdAt': query.orderBy('user.id', 'ASC'); break;
 				case '+updatedAt': query.orderBy('user.updatedAt', 'DESC'); break;
 				case '-updatedAt': query.orderBy('user.updatedAt', 'ASC'); break;
 			}
diff --git a/packages/backend/src/server/api/endpoints/users.ts b/packages/backend/src/server/api/endpoints/users.ts
index 21c585f1ad0a118602c26a8b97223cb65f463b29..8dc5841314fd2d58d97002be94ffad13ab472db6 100644
--- a/packages/backend/src/server/api/endpoints/users.ts
+++ b/packages/backend/src/server/api/endpoints/users.ts
@@ -74,8 +74,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			switch (ps.sort) {
 				case '+follower': query.orderBy('user.followersCount', 'DESC'); break;
 				case '-follower': query.orderBy('user.followersCount', 'ASC'); break;
-				case '+createdAt': query.orderBy('user.createdAt', 'DESC'); break;
-				case '-createdAt': query.orderBy('user.createdAt', 'ASC'); break;
+				case '+createdAt': query.orderBy('user.id', 'DESC'); break;
+				case '-createdAt': query.orderBy('user.id', 'ASC'); break;
 				case '+updatedAt': query.andWhere('user.updatedAt IS NOT NULL').orderBy('user.updatedAt', 'DESC'); break;
 				case '-updatedAt': query.andWhere('user.updatedAt IS NOT NULL').orderBy('user.updatedAt', 'ASC'); break;
 				default: query.orderBy('user.id', 'ASC'); break;