diff --git a/Changes.md b/Changes.md
index 71689e0a572..f4861375c5d 100644
--- a/Changes.md
+++ b/Changes.md
@@ -30,6 +30,7 @@ API
   - Added `RegistrationTypes` enum that allows the different types of registrations to be identified.
   - Added improved `registeredValues()` and `value()` overloads that provide finer-grained queries based on the type of registration.
   - Deprecated `instanceOnly` and `persistentOnly` arguments in favour of new `registrationTypes` arguments.
+  - Prevented `renameable` and `deletable` metadata from being copied during plug promotion.
 - MetadataAlgo : Added `deregisterRedundantValues()` method.
 
 1.3.5.0 (relative to 1.3.4.0)
diff --git a/python/GafferUI/NodeUI.py b/python/GafferUI/NodeUI.py
index c1b3b7ca51e..25d08ceb0fc 100644
--- a/python/GafferUI/NodeUI.py
+++ b/python/GafferUI/NodeUI.py
@@ -95,6 +95,15 @@ def __documentationURL( node ) :
 
 		),
 
+		"..." : (
+
+			# Just because a plug is renameable and/or deletable on one node
+			# does not mean it should still be when promoted to another.
+			"renameable:promotable", False,
+			"deletable:promotable", False,
+
+		),
+
 	}
 
 )
diff --git a/python/GafferUITest/BoxIOUITest.py b/python/GafferUITest/BoxIOUITest.py
new file mode 100644
index 00000000000..6b803868fdd
--- /dev/null
+++ b/python/GafferUITest/BoxIOUITest.py
@@ -0,0 +1,61 @@
+##########################################################################
+#
+#  Copyright (c) 2023, Cinesite VFX Ltd. All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions are
+#  met:
+#
+#      * Redistributions of source code must retain the above
+#        copyright notice, this list of conditions and the following
+#        disclaimer.
+#
+#      * Redistributions in binary form must reproduce the above
+#        copyright notice, this list of conditions and the following
+#        disclaimer in the documentation and/or other materials provided with
+#        the distribution.
+#
+#      * Neither the name of John Haddon nor the names of
+#        any other contributors to this software may be used to endorse or
+#        promote products derived from this software without specific prior
+#        written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+#  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+#  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+#  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+#  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+#  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+#  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+#  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+#  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+#  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+##########################################################################
+
+import unittest
+
+import Gaffer
+import GafferTest
+import GafferUI
+import GafferUITest
+
+class BoxIOUITest( GafferUITest.TestCase ) :
+
+	def testNoRedundantMetadata( self ) :
+
+		box = Gaffer.Box()
+
+		box["add"] = GafferTest.AddNode()
+
+		box["switch"] = Gaffer.Switch()
+		box["switch"].setup( box["add"]["sum"] )
+		box["switch"]["in"][0].setInput( box["add"]["sum"] )
+
+		Gaffer.PlugAlgo.promote( box["switch"]["in"][1] )
+		Gaffer.BoxIO.insert( box )
+		self.assertEqual( Gaffer.Metadata.registeredValues( box["BoxIn"]["__in"], Gaffer.Metadata.RegistrationTypes.Instance ), [] )
+
+if __name__ == "__main__":
+	unittest.main()
diff --git a/python/GafferUITest/__init__.py b/python/GafferUITest/__init__.py
index 3ccc688e451..b57c06f8f1e 100644
--- a/python/GafferUITest/__init__.py
+++ b/python/GafferUITest/__init__.py
@@ -130,6 +130,7 @@
 from .StandardNodeToolbarTest import StandardNodeToolbarTest
 from .LabelPlugValueWidgetTest import LabelPlugValueWidgetTest
 from .PythonEditorTest import PythonEditorTest
+from .BoxIOUITest import BoxIOUITest
 
 if __name__ == "__main__":
 	unittest.main()