How to resolve persistent Time Machine errors and incorrect backup reminders on Mac?

Time Machine Error

Sometime ago, Time Machine (TM) informed me that I had missed a backup. For me, this is a bit unusual, because I do not leave my external hard drive hooked up all the time, but I do remember to do a TM back up regularly.

I took the opportunity to begin to do a TM backup, but it seems that a number different things got in the way. First it told me that I did not have enough room on my destination drive, which was completely wrong, as I had 1.3 TB available, for 3.2 GB backup. Notwithstanding that, I persisted and got a back up done.

Since that day, TM continues to show the failed back up from October, and in the dropdown menu when I click on TM in the toolbar and it shows that I had a failed backup. If I open TM Settings, it shows the failed backup and my most recent backup of about 10 days ago.

At one point, I deleted all of my old backups from my external hard drive to try to get a fresh start. That had no impact on the persistent errors that TM displays.

I also get regular reminders that I have not done a time machine back up for 54 days or 57 days or whatever even if I just did one yesterday!

I have done several uneventful backups since, but I find this constant, and incorrect badgering annoying and confusing.

I would much appreciate a solution to this problem.

Thank you!

MB Pro

Sequoia 15.7.3

2.3GHz Quad Core

Intel Core i5

[Re-Titled by Moderator]

Original Title: Time Machine Errors