diff --git a/src/advanced_logger.py b/src/advanced_logger.py
index 72b25dd..f4cbfd5 100755
--- a/src/advanced_logger.py
+++ b/src/advanced_logger.py
@@ -107,17 +107,17 @@ class AdvancedLogger:
     def check_previous_roles(self, member_id: int) -> Optional[Dict]:
         """Check if member has previous role data when rejoining"""
         member_log_file = f"{self.member_logs_dir}/{member_id}.json"
-        
+
         if not os.path.exists(member_log_file):
             return None
-            
+
         try:
             logs = []
             with open(member_log_file, 'r', encoding='utf-8') as f:
                 content = f.read().strip()
                 if not content:
                     return None
-                    
+
                 # Handle legacy JSON list format
                 if content.startswith('['):
                     try:
@@ -127,7 +127,7 @@ class AdvancedLogger:
                         content_clean = content.strip('[]').strip()
                         # This is getting complex, let's just try line-by-line fallback
                         pass
-                
+
                 # If not a list or failed list parse, try NDJSON line-by-line
                 if not logs:
                     for line in content.splitlines():
@@ -139,7 +139,11 @@ class AdvancedLogger:
                             logs.append(json.loads(line))
                         except json.JSONDecodeError:
                             continue # Skip corrupt lines
-                
+
+                # Guard against empty logs list after parsing
+                if not logs:
+                    return None
+
             # Find the most recent leave event
             leave_events = [log for log in logs if isinstance(log, dict) and log.get("event_type") == "member_leave"]
             if leave_events: