Oops, I sent that prematurely. I just got this on my SL7x machine at 0436 -700, 
when daily cron ran.
===8<---
/etc/cron.daily/0yum-daily.cron:

Update notice SLBA-2018:1424-1 (from sl-fastbugs) is broken, or a bad duplicate, 
skipping.
You should report this problem to the owner of the sl-fastbugs repository.
If you are the owner, consider re-running the same command with --verbose to see 
the exact data that caused the conflict.
===8<---

(I was working my way down email folders or I'd have seen it sooner.)
{^_^}

On 2018-08-06 09:43, jdow wrote:
> 7x and it seems to have corrected itself. I got it twice so I forwarded it for 
> your consideration as the message suggested. (Once is bad timing, Twice is a 
> problem exists. So I waited for two.)
> 
> {^_^}   Joanne
> 
> On 2018-08-06 09:01, Scott Reid wrote:
>>
>> Hi,
>>
>> Thanks for the report! I haven't been able to reproduce this, but I'm assuming 
>> you're running SL 7.5. Is this correct or are you running another version?
>>
>> Thanks!
>>
>> On 8/2/18, 11:56 AM, "[log in to unmask] on 
>> behalf of jdow" <[log in to unmask] on behalf of 
>> [log in to unmask]> wrote:
>>
>>      ===8<---
>>      /etc/cron.daily/0yum-daily.cron:
>>      Update notice SLBA-2018:1424-1 (from sl-fastbugs) is broken, or a bad 
>> duplicate,
>>      skipping.
>>      You should report this problem to the owner of the sl-fastbugs repository.
>>      If you are the owner, consider re-running the same command with --verbose 
>> to see
>>      the exact data that caused the conflict.
>>      ===8<---
>>      {^_^}
>>
>