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Structure synchronizers work in background and can lead to changes in the structures or issue data that might be hard to trace. Complex configuration rules don't make things better, so it's important for JIRA admin to be able to track which synchronizers are doing what and what has caused a particular change a user is complaining about.

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Structure keeps synchronization undo files for possible script processing in case massive changes are erroneously effected on issue data. The undo files contain actions that should be taken, in reverse order, to bring issue database to the original / previous state. However, undo files do not contain changes for the structures - only for the issue data.

See Structure Files Location for information about where syncundo files are located.

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