diff --git a/tools/config/__init__.py b/tools/config/__init__.py
index 7162e88ac7..b874adaaad 100644
--- a/tools/config/__init__.py
+++ b/tools/config/__init__.py
@@ -788,7 +788,6 @@ class Config(object):
         unit_name - the unit (library/application) that defines this parameter
         unit_kind - the kind of the unit ("library" or "application")
         """
-        self.config_errors = []
         _process_config_parameters(data.get("config", {}), params, unit_name,
                                    unit_kind)
         for label, overrides in data.get("target_overrides", {}).items():