Is there a duplicate System Update?

Approximately a month ago I got a system update notification to upgrade to Android 5.1 Lollipop. I allowed the upgrade and it completed successfully.

Now (today) I am being asked to upgrade again to 5.1 Lollipop even though my phone lists my Android version as 5.1 already.

I'm hesitant about doing this second update mainly because everything is working well and I don't want to risk causing any problems.

Should I go ahead and update a second time?

Accepted answers

The small update was to fix bugs found either too late to be add in the main Android 5.1 update or to fix bugs discovered in the main update.

It's a slight software update

Thank you so much for the reply!

The small update was to fix bugs found either too late to be add in the main Android 5.1 update or to fix bugs discovered in the main update.

Thank you! Too bad they don't tell you as much. Once you OK installation, you just pray it won't mess up your phone!

Appreciate the replies :-)