diff --git a/packages/backend/src/core/DriveService.ts b/packages/backend/src/core/DriveService.ts
index bfe3816e36..65b4c24ca6 100644
--- a/packages/backend/src/core/DriveService.ts
+++ b/packages/backend/src/core/DriveService.ts
@@ -420,6 +420,7 @@ export class DriveService {
 
 		for (const fileId of exceedFileIds) {
 			const file = await this.driveFilesRepository.findOneBy({ id: fileId });
+			if (file == null) continue;
 			this.deleteFile(file, true);
 		}
 	}