Added bwc checks

Signed-off-by: Owais Kazi <[email protected]>

Author: owaiskazi19

common/src/main/java/org/opensearch/ml/common/transport/agent/MLAgentUpdateInput.java

@@ -8,6 +8,7 @@
 import static org.opensearch.core.xcontent.XContentParserUtils.ensureExpectedToken;
 import static org.opensearch.ml.common.CommonValue.TENANT_ID_FIELD;
 import static org.opensearch.ml.common.CommonValue.VERSION_2_19_0;
+import static org.opensearch.ml.common.CommonValue.VERSION_3_3_0;
 
 import java.io.IOException;
 import java.time.Instant;
@@ -108,7 +109,7 @@ public MLAgentUpdateInput(StreamInput in) throws IOException {
         Version streamInputVersion = in.getVersion();
         agentId = in.readString();
         name = in.readOptionalString();
-        type = in.readOptionalString();
+        type = streamInputVersion.onOrAfter(VERSION_3_3_0) ? in.readOptionalString() : null;
         description = in.readOptionalString();
         llmModelId = in.readOptionalString();
         if (in.readBoolean()) {
@@ -192,7 +193,9 @@ public void writeTo(StreamOutput out) throws IOException {
         Version streamOutputVersion = out.getVersion();
         out.writeString(agentId);
         out.writeOptionalString(name);
-        out.writeOptionalString(type);
+        if (streamOutputVersion.onOrAfter(VERSION_3_3_0)) {
+            out.writeOptionalString(type);
+        }
         out.writeOptionalString(description);
         out.writeOptionalString(llmModelId);
         if (llmParameters != null && !llmParameters.isEmpty()) {