bugfix: fix saga mode replay context lost start in 2.x

changes/en-us/2.x.md

@@ -34,6 +34,7 @@ Add changes here for all PR submitted to the 2.x branch.
 - [[#6372](https://github.com/apache/incubator-seata/pull/6372)] fix initializing the sql file postgresql.sql index name conflict
 - [[#6380](https://github.com/apache/incubator-seata/pull/6380)] fix sql exception when checking for the existence of the UNDO_LOG table on SQL server
 - [[#6385](https://github.com/apache/incubator-seata/pull/6385)] fix the bug where Role.participant does not execute hooks but clears them.
+- [[#6465](https://github.com/apache/incubator-seata/pull/6465)] fix(6257): fix saga mode replay context lost start in 2.x
 
 ### optimize:
 - [[#6031](https://github.com/apache/incubator-seata/pull/6031)] add a check for the existence of the undolog table

changes/zh-cn/2.x.md

@@ -34,7 +34,7 @@
 - [[#6372](https://github.com/apache/incubator-seata/pull/6372)] 修复初始化sql文件postgresql.sql 索引名称冲突问题
 - [[#6380](https://github.com/apache/incubator-seata/pull/6380)] 修复针对sql server检查UNDO_LOG表是否存在时的SQL异常
 - [[#6385](https://github.com/apache/incubator-seata/pull/6385)] 修复Role.Participant不执行hook但会清理的问题
-
+- [[#6465](https://github.com/apache/incubator-seata/pull/6465)] 修复2.0下saga模式的context replay丢失start问题
 
 
 ### optimize:

saga/seata-saga-engine/src/main/java/org/apache/seata/saga/engine/impl/ProcessCtrlStateMachineEngine.java

@@ -358,7 +358,7 @@ private Map<String, Object> getStateMachineContextVariables(StateMachineInstance
 
     protected Map<String, Object> replayContextVariables(StateMachineInstance stateMachineInstance) {
         Map<String, Object> contextVariables = new HashMap<>();
-        if (stateMachineInstance.getStartParams() == null) {
+        if (stateMachineInstance.getStartParams() != null) {
             contextVariables.putAll(stateMachineInstance.getStartParams());
         }