From 39f516ee0dc74ec7064408afd2d1083c7973e91a Mon Sep 17 00:00:00 2001
From: Fiddle-Config Team <fiddle-config-team@google.com>
Date: Wed, 8 Oct 2025 14:14:10 -0700
Subject: [PATCH] parse/.value/unparse x2 causes `ValueError: Only one base
 configuration is permitted.` if `_initial_config_expression` isn't cleared.

PiperOrigin-RevId: 816855937
---
 fiddle/_src/absl_flags/flags.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fiddle/_src/absl_flags/flags.py b/fiddle/_src/absl_flags/flags.py
index a9406cc9..d769f67a 100644
--- a/fiddle/_src/absl_flags/flags.py
+++ b/fiddle/_src/absl_flags/flags.py
@@ -178,6 +178,7 @@ def unparse(self) -> None:
     # Reset saved arguments.
     self._all_arguments = []
     self.present = 0
+    self._initial_config_expression = None
 
   def _parse_config(self, command: str, expression: str) -> None:
     if self._initial_config_expression: