From 5b02d3214d26b7e60b3548732479fc2546baeea7 Mon Sep 17 00:00:00 2001
From: s-leger <stephen@3dservices.ch>
Date: Mon, 17 May 2021 01:35:14 +0200
Subject: [PATCH] Unlink only from relevant collections (#1467)

Objects may be linked to non ifc related collections, so keep those links whatever.
---
 src/blenderbim/blenderbim/bim/module/aggregate/operator.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/blenderbim/blenderbim/bim/module/aggregate/operator.py b/src/blenderbim/blenderbim/bim/module/aggregate/operator.py
index 27a62fd4d2..3b8aa1624a 100644
--- a/src/blenderbim/blenderbim/bim/module/aggregate/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/aggregate/operator.py
@@ -45,7 +45,8 @@ class AssignObject(bpy.types.Operator):
                     self.remove_collection(collection, spatial_collection)
             else:
                 for collection in related_object.users_collection:
-                    collection.objects.unlink(related_object)
+                    if collection.name.startswith("Ifc"):
+                        collection.objects.unlink(related_object)
                 relating_collection.objects.link(related_object)
         return {"FINISHED"}