Version help

I see that there are two branches, “main”，“main-latest”；

One is RocketMQ 5.1.1 and Flink 1.15.0, this version is in the main branch;
One is RocketMQ 4.9.2 and Flink 1.15.0, this version branch is: main-latest;

I would like to ask if the bugs fixed in the code have also been fixed in addition to the difference between the two versions of the Jar package

我看到有两个分支，一个是RocketMQ 5.1.1 和 Flink 1.15.0 版本，此版本在 main分支；
一个是 RocketMQ 4.9.2 和Flink 1.15.0版本，此版本分支为：main-latest，我想请问这个两个版本除了Jar包的版本区别外，代码中修复的bug是否也同步修复了

Start by comparing the main and main-latest branches, including their RocketMQ and Flink version changes. Review the differing commits and release history to determine whether bug fixes were synchronized. Done means recording which fixes are shared and which are branch-specific; the payload names no files or tests.

Written by the indexing model from the issue text.