Explain

Author: nik9000

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -328,6 +328,7 @@ static TransportVersion def(int id) {
     public static final TransportVersion ESQL_PROFILE_INCLUDE_PLAN = def(9_111_0_00);
     public static final TransportVersion MAPPINGS_IN_DATA_STREAMS = def(9_112_0_00);
     public static final TransportVersion ESQL_SPLIT_ON_BIG_VALUES_9_1 = def(9_112_0_01);
+    // This is the first version in 9.2 and NOT in 9.1.
     public static final TransportVersion PROJECT_STATE_REGISTRY_RECORDS_DELETIONS = def(9_113_0_00);
     public static final TransportVersion ESQL_SERIALIZE_TIMESERIES_FIELD_TYPE = def(9_114_0_00);
     public static final TransportVersion ML_INFERENCE_IBM_WATSONX_COMPLETION_ADDED = def(9_115_0_00);