diff --git a/common.json b/common.json
index 86497d63f4be..e2c3887f2f00 100644
--- a/common.json
+++ b/common.json
@@ -8,7 +8,7 @@
 
   "COMMENT.jdks": "When adding or removing JDKs keep in sync with JDKs in ci/common.jsonnet",
   "jdks": {
-    "galahad-jdk":        {"name": "jpg-jdk",   "version": "26",      "build_id": "jdk-26+7-655", "platformspecific": true, "extrabundles": ["static-libs"]},
+    "galahad-jdk":        {"name": "jpg-jdk",   "version": "26",      "build_id": "jdk-26+7-xxx", "platformspecific": true, "extrabundles": ["static-libs"]},
 
     "oraclejdk17":        {"name": "jpg-jdk",   "version": "17.0.7",  "build_id": "jdk-17.0.7+8", "platformspecific": true, "extrabundles": ["static-libs"]},
     "labsjdk-ce-17":      {"name": "labsjdk",   "version": "ce-17.0.7+4-jvmci-23.1-b02", "platformspecific": true },
diff --git a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/Target_jdk_internal_util_StaticProperty.java b/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/Target_jdk_internal_util_StaticProperty.java
index 4b3db5f051e5..268d40fd4099 100644
--- a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/Target_jdk_internal_util_StaticProperty.java
+++ b/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/Target_jdk_internal_util_StaticProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -112,10 +112,6 @@ final class Target_jdk_internal_util_StaticProperty {
     @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.Reset)//
     private static String SUN_JNU_ENCODING;
 
-    @Alias//
-    @RecomputeFieldValue(kind = RecomputeFieldValue.Kind.Reset)//
-    private static String JAVA_LOCALE_USE_OLD_ISO_CODES;
-
     @Delete//
     private static String OS_NAME;
 
@@ -210,7 +206,6 @@ final class Target_jdk_internal_util_StaticProperty {
             STDOUT_ENCODING = p.getInitialProperty("stdout.encoding");
 
             SUN_JNU_ENCODING = p.getInitialProperty("sun.jnu.encoding");
-            JAVA_LOCALE_USE_OLD_ISO_CODES = p.getInitialProperty("java.locale.useOldISOCodes", "");
 
             OS_ARCH = p.getInitialProperty("os.arch");
 
@@ -337,12 +332,6 @@ public static String jnuEncoding() {
         return SUN_JNU_ENCODING;
     }
 
-    @Substitute
-    public static String javaLocaleUseOldISOCodes() {
-        assert Objects.equals(JAVA_LOCALE_USE_OLD_ISO_CODES, SystemPropertiesSupport.singleton().getInitialProperty("java.locale.useOldISOCodes", ""));
-        return JAVA_LOCALE_USE_OLD_ISO_CODES;
-    }
-
     @Substitute
     public static String osName() {
         return SystemPropertiesSupport.singleton().getInitialProperty("os.name");