From c04a05578d06b1497eb903c92448922d790ed505 Mon Sep 17 00:00:00 2001
From: Thomas Dekelver <50994394+tdekelver-bd@users.noreply.github.com>
Date: Mon, 5 Feb 2024 15:23:47 +0100
Subject: [PATCH] Bugfix ValueError: truncate requires a sorted index

https://github.com/EnergieID/entsoe-py/issues/299#issue-2118677900
---
 entsoe/entsoe.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/entsoe/entsoe.py b/entsoe/entsoe.py
index 457be06..9c52aa2 100644
--- a/entsoe/entsoe.py
+++ b/entsoe/entsoe.py
@@ -2132,7 +2132,7 @@ def query_physical_crossborder_allborders(self, country_code: Union[Area, str],
                 continue
             im.name = neighbour
             imports.append(im)
-        df = pd.concat(imports, axis=1)
+        df = pd.concat(imports, axis=1, sort=True)
         # drop columns that contain only zero's
         df = df.loc[:, (df != 0).any(axis=0)]
         df = df.tz_convert(area.tz)