EDIT

1700 incorrect orphaned synonyms observed in Cichorieae.

SELECT tb.id, tb.uuid, tn.id, tn.titleCache, tn.namecache
FROM TaxonBase tb LEFT JOIN TaxonName tn ON tn.id = tb.name_id
WHERE tb.DTYPE = 'Synonym' AND tb.acceptedTaxon_id IS NULL
ORDER BY tn.titleCache

We need to

• clean the data
• check, why this happened (I could reproduce this a couple of days ago, but don't remember how)