Campaign management plugin click tracking warning

I read in the campaign management plugin setup page GitHub - bramley/phplist-plugin-campaigns: Plugin for phplist 3.x to manage campaigns
the following:

Be careful if you have enabled click tracking and delete a “sent” message, as the campaign’s click tracking data will also be deleted and clicks of links in the campaign will no longer work.

Does that waring apply to ALL messages or the one “sent”. Thanks

Should just be for that campaign.