Database error
From STNE Wiki
A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was:(SQL query hidden)from within function "SqlBagOStuff::set". Database returned error "1062: Duplicate entry 'en_wiki-wiki_:pcache:idhash:1512-0!1!0!!en!2!edit=0' for key 'PRIMARY' (mysql)".