I don't think it made it into the database. Put differently, yours might have been the straw that broke the proverbial camel's back - there was one last attempt to upload an attachment at which point my last server host denied the request and blocked the database; yours might have been it
We won't have these problems in the future. Based on the changes we are making to the site, we will be able to load approximately 2000 times (?) as many attachments before I run into constraints.