Changelog retention defaults to 90 days after upgrade, all prior changelogs are lost.

[julianstolp]

NetBox version

v3.6.4

Python version

3.8

Steps to Reproduce

1. Set the changelog retention days to other value than 90 days with a new configuration revision
2. Do upgrade as described in documentation docs.netbox.dev
3. Log in to your netbox instance and go to /extras/changelog and the changelog retention days have been defaulted to 90 days all prior logs are deleted.

Expected Behavior

The changelog retention days should not default back to 90 days after upgrade.

Observed Behavior

/core/config/

/extras/changelog/

/extras/config-revisions/add/

[abhi1693]

I think this is an issue with the config revision that defaults to the 1st revision after upgrade. This was also brought up at #14178. I have not tested this myself and may require some changes to the redis cache checks to ensure the set revisions are not unset.

[julianstolp]

@abhi1693 I can confirm that #14178 is actually the root cause for the behavior i have observed.

[abhi1693]

The issue is with the clearcache command that resets the config revisions.

[jeremystretch]

Rather than working around the specific cache entry, a more robust solution may be to move the designation of the active config version into the database. We could do this with a boolean column and a constraint limiting the table to a single true value.

I suppose this presents a problem when enabling maintenance mode, however.