From 1bb2656c4209bdb7e253c88b44b64688344652e1 Mon Sep 17 00:00:00 2001
From: Arthur Hanson <worldnomad@gmail.com>
Date: Thu, 10 Oct 2024 11:29:04 -0700
Subject: [PATCH] 17614 Disallow removal of virtual chassis from device if set
 as master

---
 netbox/dcim/models/devices.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/netbox/dcim/models/devices.py b/netbox/dcim/models/devices.py
index a2b78957e..554c8390b 100644
--- a/netbox/dcim/models/devices.py
+++ b/netbox/dcim/models/devices.py
@@ -983,6 +983,13 @@ class Device(
                 'vc_position': _("A device assigned to a virtual chassis must have its position defined.")
             })
 
+        if hasattr(self, 'vc_master_for') and self.vc_master_for and self.vc_master_for != self.virtual_chassis:
+            raise ValidationError({
+                'virtual_chassis': _("Cannot change to a different virtual chassis when assigned as a master. Remove it as the master of {master} first.").format(
+                    master=self.vc_master_for
+                )
+            })
+
     def _instantiate_components(self, queryset, bulk_create=True):
         """
         Instantiate components for the device from the specified component templates.