Werk #22810: Predictive levels: recreate broken files

Component	Core & setup
Title	Predictive levels: recreate broken files
Date	Oct 19, 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 2.5.0p18 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

If a stored prediction file of a check with predictive levels was empty or damaged, for example after the disk ran full, every check of the host using predictive levels crashed on every check cycle with ValidationError: 1 validation error for PredictionInfo, until the file was removed by hand.

A damaged prediction file is now ignored and recreated, and the prediction is computed again, as for a new prediction.

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