diff --git a/scanner.py b/scanner.py
index ef37f8d..589533a 100644
--- a/scanner.py
+++ b/scanner.py
@@ -62,7 +62,8 @@ def run_scan(dept: str = None, workers: int = 5, login_delay: int = 3):
     })
 
     scan_id = log_scan_start()
-    clear_links()  # Fresh start for links each scan
+    if dept is None:
+        clear_links()  # Full scan only — dept scans upsert without wiping other depts
 
     def on_progress(done, total, ip, result):
         from datetime import datetime