OVERVIEW: I added my new work email account to Outlook, and for some reason I lost all my mail "Rules" for my personal email account. I want to recover these rules, or otherwise fix this issue.

I have Outlook 2019 Professional Pro (for PC) set up for several different email accounts. But for my primary "personal" email account, I had a bunch of rules set up to display emails from subfolders in a "personal viewing folder". This was so I could see all my important personal emails, AND also have them sorted in their own subdirectories. This was working fine until...

Yesterday I added a new "work" email account. Setup seemed to be fine. But today I noticed that emails in my "personal viewing folder" aren't displaying properly. So I went to "Rules" > "Manage Rules & Alerts" and all my rules are gone (it's empty)! There is something else strange on that screen; there is a drop-down called "Apply changes to this folder:", well for some reason in this drop-down my "personal" email and "work" emails show up as a combined choice. The drop-down choices look like this:

"Apply changes to this folder:"

• Inbox [Email1@aa.com]
• Inbox [Email2@bb.com]
• Inbox [Personal-email@cc.com, Work-email@dd.com]

I would like to put Rules on my Personal email again. So that probably means I would have to either:

1. Fix the issue by recovering my old Personal email rules somehow (preferred) OR:
2. Somehow separate the personal and work emails in the drop-down so that I can create a new set of rules for JUST my Personal emails.

Does anybody know what is going on, or can someone please help me?