From c3f2c9324c782828c891f5d196d60b6218eaf672 Mon Sep 17 00:00:00 2001
From: UbitUmarov <ajlduarte@sapo.pt>
Date: Mon, 22 Jan 2024 03:12:54 +0000
Subject: [PATCH] on GetLinkNumPart ignore again link number 0 on a linkset
 with more than one prim, fix

---
 OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index af2c5369c1..7dc84c646b 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -3070,8 +3070,13 @@ namespace OpenSim.Region.Framework.Scenes
         {
             if (linknum < 0)
                 return null;
-            //if (linknum < 2)
-            //    return RootPart;
+            if (linknum < 2)
+            {
+                // old code and sl do ignore linknum = 0 on linksets with more than one prim
+                if (linknum == 0 && m_parts.Count > 1)
+                    return null;
+                return RootPart;
+            }
 
             Span<SceneObjectPart> parts = m_parts.GetArray().AsSpan();
             if (linknum <= parts.Length)