fix versions

Signed-off-by: Peter Alfonsi <petealft@amazon.com>

Author: Peter Alfonsi

CHANGELOG.md

@@ -63,8 +63,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add a mapper for context aware segments grouping criteria ([#19233](https://github.com/opensearch-project/OpenSearch/pull/19233))
 - Return full error for GRPC error response ([#19568](https://github.com/opensearch-project/OpenSearch/pull/19568))
 - Add pluggable gRPC interceptors with explicit ordering([#19005](https://github.com/opensearch-project/OpenSearch/pull/19005))
-
 - Add metrics for the merged segment warmer feature ([#18929](https://github.com/opensearch-project/OpenSearch/pull/18929))
+- Add an `item_count` metric for field data cache API ([#19174](https://github.com/opensearch-project/OpenSearch/pull/19174))
 
 ### Changed
 - Faster `terms` query creation for `keyword` field with index and docValues enabled ([#19350](https://github.com/opensearch-project/OpenSearch/pull/19350))

server/src/main/java/org/opensearch/index/fielddata/FieldDataStats.java

@@ -82,7 +82,7 @@ public FieldDataStats(StreamInput in) throws IOException {
         memorySize = in.readVLong();
         evictions = in.readVLong();
         fieldMemorySizes = in.readOptionalWriteable(FieldMemoryStats::new);
-        if (in.getVersion().onOrAfter(Version.V_3_3_0)) {
+        if (in.getVersion().onOrAfter(Version.V_3_4_0)) {
             itemCount = in.readVLong();
             fieldItemCounts = in.readOptionalWriteable(FieldCountStats::new);
         }
@@ -175,7 +175,7 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeVLong(memorySize);
         out.writeVLong(evictions);
         out.writeOptionalWriteable(fieldMemorySizes);
-        if (out.getVersion().onOrAfter(Version.V_3_3_0)) {
+        if (out.getVersion().onOrAfter(Version.V_3_4_0)) {
             out.writeVLong(itemCount);
             out.writeOptionalWriteable(fieldItemCounts);
         }