# Managing old data

**URL:** <https://community.jenkins.io/t/managing-old-data/5447>\
**Category:** Using Jenkins\
**Created:** [January 24, 2023, 12:26pm UTC](https://community.jenkins.io/t/managing-old-data/5447 "2023-01-24T12:26:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![DavidA2014](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/davida2014/32/88_2.png) [@DavidA2014](https://community.jenkins.io/u/DavidA2014)\
**Post date:** [January 24, 2023, 12:26pm UTC](https://community.jenkins.io/t/managing-old-data/5447/1 "2023-01-24T12:26:58Z")

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Hi, I am migrating some jobs from an old to a new Jenkins controller. Many of the migrated jobs are reported as having old data. Here is an example:

`CannotResolveClassException: jenkins.scm.cvs.QuietPeriodCompleted, CannotResolveClassException: jenkins.metrics.impl.TimeInQueueAction, CannotResolveClassException: io.jenkins.blueocean.service.embedded.BlueOceanUrlAction, CannotResolveClassException: org.jenkinsci.plugins.envinject.EnvInjectPluginAction, CannotResolveClassException: com.sonyericsson.rebuild.RebuildAction`

The last line suggests the warning is associated with the Rebuild plugin but I don’t think these jobs are using that plugin.

Any thoughts about how to correct the data please?

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**Author:** ![halkeye](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/halkeye/32/8_2.png) [@halkeye](https://community.jenkins.io/u/halkeye)\
**Post date:** [January 24, 2023, 9:57pm UTC](https://community.jenkins.io/t/managing-old-data/5447/2 "2023-01-24T21:57:39Z")

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In your /manage screen there is a manage old data link. That will go through all jobs and remove any plugin data for classes that no longer exist (uninstalled plugins, refactors, etc)