diff --git a/mautrix_telegram/portal.py b/mautrix_telegram/portal.py
index 9e4ddf26..e38aa9f6 100644
--- a/mautrix_telegram/portal.py
+++ b/mautrix_telegram/portal.py
@@ -3236,12 +3236,7 @@ class Portal(DBPortal, BasePortal):
             await dbm.insert()
             await DBMessage.replace_temp_mxid(temporary_identifier, self.mxid, event_id)
         except (IntegrityError, UniqueViolationError) as e:
-            self.log.exception(
-                f"{e.__class__.__name__} while saving message mapping. "
-                "This might mean that an update was handled after it left the "
-                "dedup cache queue. You can try enabling bridge.deduplication."
-                "pre_db_check in the config."
-            )
+            self.log.exception(f"{type(e).__name__} while saving message mapping")
             await intent.redact(self.mxid, event_id)
             return
         if isinstance(evt, Message) and evt.reactions:
diff --git a/mautrix_telegram/portal_util/deduplication.py b/mautrix_telegram/portal_util/deduplication.py
index 201cfb5b..f31d4f79 100644
--- a/mautrix_telegram/portal_util/deduplication.py
+++ b/mautrix_telegram/portal_util/deduplication.py
@@ -62,7 +62,6 @@ media_content_table = {
 
 
 class PortalDedup:
-    pre_db_check: bool = False
     cache_queue_length: int = 256
 
     _dedup: deque[bytes | int]