diff --git a/filemgr/filemgr.py b/filemgr/filemgr.py
index c795ed7..f55bced 100644
--- a/filemgr/filemgr.py
+++ b/filemgr/filemgr.py
@@ -67,21 +67,31 @@ class FileMgr:
 		async with db.sqlorContext(dbname) as sor:
 			bool = await self.is_folder_ownerid(sor, u.userorgid)
 			if not bool:
+				os.unlink(realpath)
 				e = Exception(f'owner mismatch({u.userorgid=})')
 				exception(f'{e=}\n{format_exc()}')
 				raise
 			quota, expired_date = await self.get_organization_quota(sor,
 					u.userorgid)
 			if quota is None:
+				os.unlink(realpath)
 				e = Exception(f'{u.userorgid} has not quota')
 				exception(f'{e}\n{format_exc()}')
 				raise e
 			quota_used = await self.get_quota_used(sor, u.userorgid)
 			if quota_used + filesize / 1000000 >= quota:
+				os.unlink(realpath)
 				self.message = f'{quota=}M, {quota_used=}M {filesize=} overused'
 				e = Exception(f'{u.userorgid} quota overflow')
 				exception(f'{e}\n{format_exc()}')
 				raise e
+			recs = await sor.R('file',{'hashvalue': hashvalue, 'ownerid': u.userorgid})
+			if len(recs) > 0:
+				os.unlink(realpath)
+				e = Exception(f'File exists')
+				exception(f'{e=}\n{format_exc()}')
+				return False
+				
 			recs = await sor.R('file',{'hashvalue': hashvalue})
 			if len(recs) > 0:
 				os.unlink(realpath)