[BUG]fastjson2中set方法连续多次设置数组，仅第一次set有效

### 问题描述
fastjson2中JSONPath set方法连续两次设置数组，仅第一次有效

### 环境信息

- OS信息：
- JDK信息：Openjdk21
- 版本信息：Fastjson2-2.0.61

### 重现步骤

```java
JSONObject row = new JSONObject();

JSONObject aaa1 = new JSONObject();
aaa1.put("import_id","250922223357263690");
JSONObject bbb1 = new JSONObject();
bbb1.put("import_id","250922223357263690");

JSONPath.set(row,"data.aaa[0]",aaa1);
JSONPath.set(row,"data.bbb[0]",bbb1);
System.out.println("fastjson2 data:"+JSON.toJSON(row));

```

### 期待的正确结果
预期：{"data":{"aaa":[{"import_id":"111"}],"bbb":[{"import_id":"222"}]}}
目前：{"data":{"aaa":[{"import_id":"111"}]}}

JSONPath.set(row,"data.bbb[0]",bbb1); 貌似未生效，也未报错

Start at the JSONPath.set entry point and reproduce the issue with the two consecutive array assignments shown in the report. Trace how the data object is created or updated for each path, then add a regression test covering both assignments. Done means data.aaa[0] and data.bbb[0] are both present after the calls.

Written by the indexing model from the issue text.