diff --git a/app/modules/services/default_task_sync.py b/app/modules/services/default_task_sync.py
index 2b19d40..967571d 100644
--- a/app/modules/services/default_task_sync.py
+++ b/app/modules/services/default_task_sync.py
@@ -70,11 +70,16 @@ def _copy_default_columns(
             setattr(target, name, new_value)
             changed = True
 
-    # System defaults being synced are expected to be usable in the firm.
-    if hasattr(target, "is_active") and getattr(target, "is_active", None) is not True:
-        target.is_active = True
-        changed = True
-
+    # IMPORTANT:
+    # is_active is copied from ServiceDefaultTaskTemplate above because it is
+    # a shared mapped column. Do NOT force FirmServiceTaskTemplate back to True.
+    #
+    # This makes System Default activation state authoritative during sync:
+    #   System Default disabled  -> Firm Task disabled
+    #   System Default enabled   -> Firm Task enabled
+    #
+    # Firm-only/custom tasks remain untouched because this function is called
+    # only for tasks matched to current System Defaults.
     return changed