fix positions

Author: dnhatn

x-pack/plugin/esql/compute/src/main/generated-src/org/elasticsearch/compute/aggregation/ValuesBytesRefAggregator.java

@@ -130,6 +130,9 @@ $endif$
 
     public static void combineStates(GroupingState current, int currentGroupId, GroupingState state, int statePosition) {
         var sorted = state.sortedForOrdinalMerging(current);
+        if (statePosition > state.maxGroupId) {
+            return;
+        }
         var start = statePosition > 0 ? sorted.counts[statePosition - 1] : 0;
         var end = sorted.counts[statePosition];
         for (int i = start; i < end; i++) {