From 898eca8bdecfc43fbed2302e3702228ea5e60be8 Mon Sep 17 00:00:00 2001
From: Matt Davis <matteius@gmail.com>
Date: Wed, 9 Nov 2022 22:23:19 -0500
Subject: [PATCH] Fix for pipenv lock behaving like keep_outdated flag is
 always True.

---
 pipenv/core.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pipenv/core.py b/pipenv/core.py
index c51eb689..aa826cf6 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -1157,6 +1157,13 @@ def do_lock(
                 err=True,
             )
 
+        # Prune old lockfile category as new one will be created.
+        if not keep_outdated:
+            try:
+                del lockfile[category]
+            except KeyError:
+                pass
+
         from pipenv.utils.resolver import venv_resolve_deps
 
         # Mutates the lockfile