diff --git a/wsio/finstitutions/trading/tick_out.py b/wsio/finstitutions/trading/tick_out.py
index 2b8c0f8..f76c1f1 100644
--- a/wsio/finstitutions/trading/tick_out.py
+++ b/wsio/finstitutions/trading/tick_out.py
@@ -462,8 +462,8 @@ async def handle_disconnect(sid, reason) -> None:
 
     # register the disconnect in the global variable, and on the cache server:
     client_info = {}
-    async with exclusive_lock: client_info = CONNECTED_CLIENTS.pop(sid)
-    sid_uncached = await redis_cache.delete(key = client_info["redisKey"])
+    async with exclusive_lock: client_info = CONNECTED_CLIENTS.pop(sid, None)
+    sid_uncached = await redis_cache.delete(key = client_info["redisKey"]) if client_info else False
     printer("SOCKET DISCONNECTED", sid, reason, sid_uncached)