Werk #22743: veeam_client: don't crash on a negative backup age

Component	Checks & agents
Title	veeam_client: don't crash on a negative backup age
Date	Oct 15, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p17 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p38 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The services of the Veeam clients (VEEAM Client) crashed with ValueError: Cannot render negative timespan if the last backup appeared to have finished in the future. This happens when the clocks of the Veeam host and the Checkmk server differ slightly.

Such a service now goes UNKNOWN with Last backup: end time is in the future.

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