diff --git a/generic_config_updater/gu_common.py b/generic_config_updater/gu_common.py
index 3b25ec292a1..9f538ace4a4 100644
--- a/generic_config_updater/gu_common.py
+++ b/generic_config_updater/gu_common.py
@@ -145,8 +145,13 @@ def validate_config_db_config(self, config_db_as_json):
                                         self.validate_lanes]
 
         try:
-            # Loading data automatically does full validation
-            sy.loadData(config_db_as_json)
+            # Loading data automatically does full validation.
+            # quiet=True suppresses sonic_yang.loadData's LOG_ERR
+            # "Data Loading Failed" line on every exception (log-and-throw
+            # antipattern). Real failures still surface via the returned
+            # tuple / SonicYangException, so callers retain full error
+            # signal -- only the duplicate syslog spam is silenced.
+            sy.loadData(config_db_as_json, quiet=True)
             for supplemental_yang_validator in supplemental_yang_validators:
                 success, error = supplemental_yang_validator(config_db_as_json)
                 if not success:
diff --git a/tests/generic_config_updater/patch_sorter_test.py b/tests/generic_config_updater/patch_sorter_test.py
index a092f26101a..c60b7b07532 100644
--- a/tests/generic_config_updater/patch_sorter_test.py
+++ b/tests/generic_config_updater/patch_sorter_test.py
@@ -946,6 +946,23 @@ def test_validate__valid_config_db_after_applying_move__success(self):
         self.assertTrue(
                 validator.validate(JsonMoveGroup("", self.any_move), self.any_diff, self.any_simulated_config)[0])
 
+    def test_validate__passes_quiet_true_to_config_wrapper(self):
+        # Regression guard: gu_common.ConfigWrapper.validate_config_db_config
+        # MUST call sonic_yang.loadData with quiet=True so the speculative
+        # patch-sort search does not spam syslog with transient YANG
+        # leafref LOG_ERR lines (the sorter already handles those via the
+        # returned tuple). This is enforced inside ConfigWrapper itself,
+        # so all callers benefit; FullConfigMoveValidator simply delegates.
+        config_wrapper = Mock()
+        config_wrapper.validate_config_db_config.return_value = (True, None)
+        validator = ps.FullConfigMoveValidator(config_wrapper)
+
+        validator.validate(JsonMoveGroup("", self.any_move), self.any_diff, self.any_simulated_config)
+
+        config_wrapper.validate_config_db_config.assert_called_once_with(
+            self.any_simulated_config)
+
+
 class TestCreateOnlyMoveValidator(unittest.TestCase):
     def setUp(self):
         self.validator = ps.CreateOnlyMoveValidator(ps.PathAddressing())