Werk #18102: check_sftp: Fix invalid rule configuration when updating

Component	Checks & agents
Title	check_sftp: Fix invalid rule configuration when updating
Date	May 27, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.4.0p3 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Updating from version 2.3 with an already existing "Check SFTP Service" where the password was set previously resulted in a ValueError. This has been fixed.

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