This thing happened in my company's jenkins server. My team lead updated plugins, and after that all the credentials disappeared.

Then from the backup, I replicated the same environment to test things out. I figured out that this issue is cause by updating GitLab Branch Source Plugin from version 642.v9ed86b_b_54384 to 659.va_685a_51fda_db_

All the credentials in the Credentials section under Manage Jenkins is gone except for one.

I will provide all the attachments here.

Also I want to know whether to keep this plugin or not. Because I don't want to have the same issue again. Are there any alternatives to this plugin.

Will there be any other plugin that can cause the same issue.

And what things I should do in order to prevent this in the future.