Archive with commit: 'automatic saving is now disabled'

Today I had a power failure, and my MineOs server (own hardware) could not start the Survival game anymore. But I had archives every hour. So restored the last archive, but something went wrong. I lost 5 days of building.

Now i looked at the settings, and configured (scheduled) another way:

*/20 * * * * archive_with_commit

So every 20 minutes an archive (full backup) with a commit.
But when I’m looking at the log I see this:

[18:06:04] [Server thread/INFO]: xxx[/192.168.178.26:51152] logged in with entity id 137 at (-483.4883744637195, 63.0, -1327.948938129967)
[18:06:04] [Server thread/INFO]: xxxxxjoined the game

[18:11:57] [Server thread/INFO]: Saving the game (this may take a moment!)
[18:11:57] [Server thread/INFO]: Saved the game
[18:20:00] [Server thread/INFO]: Saving is already turned on
[18:20:01] [Server thread/INFO]: Saving the game (this may take a moment!)
[18:20:01] [Server thread/INFO]: Saved the game
[18:20:01] [Server thread/INFO]: Automatic saving is now disabled

What does this mean?