Converting a UUID to bytes was incorrect.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,9 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>The Recover tool did not convert correctly convert CLOB data with non-ASCII characters.
+<ul><li>Converting a UUID to bytes was incorrect. Because of that, updatable result sets on
+    tables with UUID primary key did not work. 
+</li><li>The Recover tool did not convert correctly convert CLOB data with non-ASCII characters.
     This was also a problem when using the automatic upgrade to the page store file format.
 </li></ul>
 

h2/src/main/org/h2/value/ValueUuid.java

@@ -167,8 +167,8 @@ public class ValueUuid extends Value {
     public byte[] getBytes() {
         byte[] buff = new byte[16];
         for (int i = 0; i < 8; i++) {
-            buff[i] = (byte) ((high >> (8 * (8 - i))) & 255);
-            buff[8 + i] = (byte) ((low >> (8 * (8 - i))) & 255);
+            buff[i] = (byte) ((high >> (8 * (7 - i))) & 255);
+            buff[8 + i] = (byte) ((low >> (8 * (7 - i))) & 255);
         }
         return buff;
     }