diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0935b714..0038c383 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Fixed
 - Fixed missing `getField()` method on blocks
 - Fixed an error that occurred when changing the propagation method for a Neo field with no blocks
+- Fixed an error that could occur when cloning block types, if Neo's `blockTypeIconSelectMode` plugin setting is set to `'path'`
 
 ## 4.0.6 - 2024-02-23
 
diff --git a/src/controllers/Configurator.php b/src/controllers/Configurator.php
index b73c9255..34628c5f 100644
--- a/src/controllers/Configurator.php
+++ b/src/controllers/Configurator.php
@@ -105,7 +105,7 @@ private function _renderBlockType(): array
                 $newBlockType->ignorePermissions = $settings['ignorePermissions'];
                 $newBlockType->description = $settings['description'] ?? '';
                 $newBlockType->iconFilename = $settings['iconFilename'] ?? '';
-                $newBlockType->iconId = $settings['iconId'];
+                $newBlockType->iconId = $settings['iconId'] ?? null;
                 $newBlockType->minBlocks = (int)$settings['minBlocks'];
                 $newBlockType->maxBlocks = (int)$settings['maxBlocks'];
                 $newBlockType->minSiblingBlocks = (int)$settings['minSiblingBlocks'];