diff --git a/core/aimedb.py b/core/aimedb.py
index c6887d3..ab400c2 100644
--- a/core/aimedb.py
+++ b/core/aimedb.py
@@ -194,9 +194,9 @@ class AimedbServlette():
         
         if user_id and user_id > 0:
             await self.data.card.update_card_last_login(req.access_code)
-            if req.access_code.startswith("010") or req.access_code.startswith("3"):
+            if req.access_code.startswith("010") or req.access_code.startswith("3") and req.serial_number != 0x04030201: # Default segatools sn
                 await self.data.card.set_chip_id_by_access_code(req.access_code, req.serial_number)
-                self.logger.info(f"Attempt to set chip id to {req.serial_number} for access code {req.access_code}")
+                self.logger.info(f"Attempt to set chip id to {req.serial_number:08X} for access code {req.access_code}")
         return ret
 
     async def handle_lookup_ex(self, data: bytes, resp_code: int) -> ADBBaseResponse:
@@ -370,7 +370,7 @@ class AimedbServlette():
             )
         
         if user_id > 0:
-            if req.access_code.startswith("010") or req.access_code.startswith("3"):
+            if req.access_code.startswith("010") or req.access_code.startswith("3") and req.serial_number != 0x04030201: # Default segatools sn:
                 await self.data.card.set_chip_id_by_access_code(req.access_code, req.serial_number)
                 self.logger.info(f"Attempt to set chip id to {req.serial_number} for access code {req.access_code}")
             
diff --git a/titles/pokken/base.py b/titles/pokken/base.py
index ee0d134..78ca863 100644
--- a/titles/pokken/base.py
+++ b/titles/pokken/base.py
@@ -165,7 +165,8 @@ class PokkenBase:
                 f"Register new card {access_code} (UserId {user_id}, CardId {card_id})"
             )
 
-            await self.data.card.set_chip_id_by_access_code(access_code, int(request.load_user.chip_id[:8], 16))
+            if int(request.load_user.chip_id[:8], 16) != 0x04030201:
+                await self.data.card.set_chip_id_by_access_code(access_code, int(request.load_user.chip_id[:8], 16))
 
         elif card is None:
             self.logger.info(f"Registration of card {access_code} blocked!")
@@ -175,7 +176,7 @@ class PokkenBase:
         else:
             user_id = card['user']
             card_id = card['id']
-            if not card['chip_id']:
+            if not card['chip_id'] and int(request.load_user.chip_id[:8], 16) != 0x04030201: # Default segatools sn:
                 await self.data.card.set_chip_id_by_access_code(access_code, int(request.load_user.chip_id[:8], 16))
 
         """ 
diff --git a/titles/sao/base.py b/titles/sao/base.py
index 76a1def..da982d8 100644
--- a/titles/sao/base.py
+++ b/titles/sao/base.py
@@ -85,7 +85,7 @@ class SaoBase:
             card_id = await self.data.card.create_card(user_id, req.access_code)
             if req.access_code.startswith("5"):
                 await self.data.card.set_idm_by_access_code(card_id, req.chip_id[:16])
-            elif req.access_code.startswith("010") or req.access_code.startswith("3"):
+            elif req.access_code.startswith("010") or req.access_code.startswith("3") and int(req.chip_id[:8], 16) != 0x04030201:
                 await self.data.card.set_chip_id_by_access_code(card_id, int(req.chip_id[:8], 16))
 
             if card_id is None: