diff --git a/servicenow_api/servicenow_models.py b/servicenow_api/servicenow_models.py
index fbe3896..1a74b74 100644
--- a/servicenow_api/servicenow_models.py
+++ b/servicenow_api/servicenow_models.py
@@ -186,6 +186,7 @@ class CICDModel(BaseModel):
     The class includes field_validator functions for specific attribute validations.
     """
 
+    sys_id: Optional[str] = None
     model_config = ConfigDict(validate_assignment=True)
     result_id: Optional[str] = None
     progress_id: Optional[str] = None