Noticed this exception in twistd.log on ews server. This error is happenning consistently for atleast past few days (in all the logs we currently have on ews server, from 2023-01-28). 2023-02-02 06:08:55-0800 [-] Got fatal Exception on DB Traceback (most recent call last): File "/usr/local/lib64/python3.6/site-packages/twisted/python/threadpool.py", line 255, in <lambda> ctx, func, *args, **kw File "/usr/local/lib64/python3.6/site-packages/twisted/python/context.py", line 118, in callWithContext return self.currentContext().callWithContext(ctx, func, *args, **kw) File "/usr/local/lib64/python3.6/site-packages/twisted/python/context.py", line 83, in callWithContext return func(*args, **kw) File "/usr/local/lib/python3.6/site-packages/buildbot/db/pool.py", line 217, in __thd log.err(e, 'Got fatal Exception on DB') --- <exception caught here> --- File "/usr/local/lib/python3.6/site-packages/buildbot/db/pool.py", line 190, in __thd rv = callable(arg, *args, **kwargs) File "/usr/local/lib/python3.6/site-packages/buildbot/db/logs.py", line 155, in thdAddLog "log with slug '%r' already exists in this step" % (slug,)) from e builtins.KeyError: "log with slug ''stdio'' already exists in this step"