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两种方案：

解决办法

方法一，卸载重装

helm uninstall <release name> -n <namespace>

方法二，回滚

This error can happen for few reasons, but it most commonly occurs when there is an interruption during the upgrade/install process as you already mentioned.
发生此错误的原因有很多，但最常见的原因是升级/安装过程中出现中断，正如您之前提到的。

To fix this one may need to, first rollback to another version, then reinstall or helm upgrade again.
要修复这个问题，可能需要先回滚到另一个版本，然后重新安装或再次进行 helm upgrade。

Try below command to list
尝试以下命令列出

helm ls --namespace <namespace>

but you may note that when running that command ,it may not show any columns with information
但你可能会注意到，运行该命令时，它可能不会显示任何包含信息的列

Try to check the history of the previous deployment
尝试检查上次部署的历史记录

helm history <release> --namespace <namespace>

This provides with information mostly like the original installation was never completed successfully and is pending state something like STATUS: pending-upgrade state.
这提供的信息大多类似于原始安装从未成功完成并且处于**待处理状态，**例如状态：待处理升级状态。

To escape from this state, use the rollback command:
要退出此状态，请使用 rollback 命令：

helm rollback <release> <revision> --namespace <namespace>

revision is optional, but you should try to provide it.
修订是可选的，但您应该尝试提供它。

You may then try to issue your original command again to upgrade or reinstall.
然后您可以尝试再次发出原始命令来升级或重新安装。

References

• UPGRADE FAILED: another operation (install/upgrade/rollback) is in progress