v1909 Update interfering with v2004 update

A couple of hours ago I started updating a laptop from v1909 to v2004 using the Windows 10 Upgrade Assistant.
When the installation reached 95% I got a separate notification that "updates are ready, restart your computer outside of work hours".
I checked and it is a Cumulative Update for version 1909.

Obviously not going to restart for the 1909 update. I just let Update Assistant finish, and I just restarted through the Assistant message.

This is a strange situation. I had checked for and installed v1909 updates just prior to doing the v2004 update. The Cumulative Update was not in that batch.

By the time you read this I may already know the answer. It's "Working on Updates - 2%" now. But in the meantime does anyone think this is going to be a horror show, or will the v1909 update just get ignored?

Negative.
It's in the middle of v2004 update.
That would require a forced shutdown.

Hi guys. Thanks for the input.

I let it run (2004 update) and nothing new happened. I get the same stop code I got the last 3 attempts (I will post a separate thread on that issue soon).

Interesting regarding this issue is that back on the 1909 desktop after "undoing changes made to your computer" I looked in Windows Update and the Cumulative Update was installed.
I thought I saw a double restart in the beginning but I wasn't sure. Now I am. It seems Windows installed the 1909 update first, restarted, then went on to the 2004 update.
Fascinating Captain!

BTW ZBOOK: Verion 1909 - Build 18363.1139

Would it be better to post the v2004 update failure and stop code in the BSOD forum or here?

ZBOOK: Please refer to this new thread :
Update to v2004 Fails - 2nd Boot - System Thread Exception Not Handled