From ac756bb8e87e0db7ba722e59403e7b0fec006cc0 Mon Sep 17 00:00:00 2001
From: Nyall Dawson <nyall.dawson@gmail.com>
Date: Fri, 7 Feb 2025 11:19:24 +1000
Subject: [PATCH] [memory] Ignore unset attributes when calling
 changeAttributeValues

---
 src/core/providers/memory/qgsmemoryprovider.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/providers/memory/qgsmemoryprovider.cpp b/src/core/providers/memory/qgsmemoryprovider.cpp
index d9cff37c84b..f4814ffee70 100644
--- a/src/core/providers/memory/qgsmemoryprovider.cpp
+++ b/src/core/providers/memory/qgsmemoryprovider.cpp
@@ -682,6 +682,9 @@ bool QgsMemoryProvider::changeAttributeValues( const QgsChangedAttributesMap &at
         continue;
 
       QVariant attrValue = it2.value();
+      if ( attrValue.userType() == qMetaTypeId< QgsUnsetAttributeValue >() )
+        continue;
+
       // Check attribute conversion
       const bool conversionError { ! QgsVariantUtils::isNull( attrValue )
                                    && ! mFields.at( it2.key() ).convertCompatible( attrValue, &errorMessage ) };