Database Exeption in Gorups


After 1.7.2 Upgrade I have some Problems with Groups. If I try to view or create groups i get the Warning: 

DatabaseException QUERY: SELECT count(e.guid) as total from entities e join objects_entity o on e.guid=o.guid where e.type='object' and e.subtype=9 and e.container_guid = 256 and ( (1 = 1) and e.enabled='yes')

Table 'elgg_db.entities' doesn't exist
How can I fix this ?