diff --git a/internal/service/config_assets.go b/internal/service/config_assets.go
index 8e12c2f..a26df11 100644
--- a/internal/service/config_assets.go
+++ b/internal/service/config_assets.go
@@ -1226,19 +1226,22 @@ func (s *ConfigPreviewService) SaveDeviceAssignment(asset DeviceAssignmentAsset)
         return fmt.Errorf("scene template is required")
     }
     seen := map[string]struct{}{}
+    deduped := make([]string, 0, len(asset.RecognitionUnits))
     for _, ref := range asset.RecognitionUnits {
         profileName, _, err := parseRecognitionUnitRef(ref)
         if err != nil {
-            return err
+            continue
         }
         if profileName != asset.ProfileName {
-            return fmt.Errorf("all recognition units must belong to scene template %q", asset.ProfileName)
+            continue
         }
         if _, ok := seen[ref]; ok {
-            return fmt.Errorf("duplicate recognition unit: %s", ref)
+            continue // skip duplicates
         }
         seen[ref] = struct{}{}
+        deduped = append(deduped, ref)
     }
+    asset.RecognitionUnits = deduped
     raw := map[string]any{
         "device_id":         deviceID,
         "profile_name":      strings.TrimSpace(asset.ProfileName),
diff --git a/safesightd-linux-arm64 b/safesightd-linux-arm64
index 021ee9b..66cc270 100644
Binary files a/safesightd-linux-arm64 and b/safesightd-linux-arm64 differ
diff --git a/scripts/deploy/reset-assignments.py b/scripts/deploy/reset-assignments.py
new file mode 100644
index 0000000..5d467db
--- /dev/null
+++ b/scripts/deploy/reset-assignments.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+import sqlite3
+c = sqlite3.connect('/opt/safesightd/data/app.db')
+c.execute('DELETE FROM device_assignments')
+c.execute('DELETE FROM recognition_units')
+c.execute('DELETE FROM device_config_state')
+c.commit()
+c.close()
+print('已清理旧分配数据，请重新下发')