Database error (EntityTopic, 13)

From Hi.gher. Space

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 'hddb-wiki_:pcache:idhash:1899-0!1!0!!en!2!edit=0' for key 'PRIMARY' (localhost)".