diff --git a/src/app.py b/src/app.py
index 3b749725d..03e12c84e 100644
--- a/src/app.py
+++ b/src/app.py
@@ -1209,7 +1209,8 @@ def app_install(
     for question in questions:
         # Or should it be more generally question.redact ?
         if question.type == "password":
-            del env_dict_for_logging[f"YNH_APP_ARG_{question.name.upper()}"]
+            if f"YNH_APP_ARG_{question.name.upper()}" in env_dict_for_logging:
+                del env_dict_for_logging[f"YNH_APP_ARG_{question.name.upper()}"]
             if question.name in env_dict_for_logging:
                 del env_dict_for_logging[question.name]