Akonadi Migration Problem

I'm having trouble with Akonadi after switching from OpenSUSE 13.2 to 
Tumbleweed (see below). Any help is appreciated. Please Cc me in responses as 
I'm not subscribed to this list.

TIA, Andreas

skipping update 26
skipping update 28
skipping update 30
Adding new foreign key constraints
"ALTER TABLE PimItemFlagRelation ADD FOREIGN KEY (PimItem_id) REFERENCES 
PimItemTable(id) ON UPDATE CASCADE ON DELETE CASCADE"
Updating index failed:  
Sql error: Cannot add or update a child row: a foreign key constraint fails 
(`akonadi`.`#sql-15ee_4`, CONSTRAINT `#sql-15ee_4_ibfk_1` FOREIGN KEY 
(`PimItem_id`) REFERENCES `pimitemtable` (`id`) ON DELETE CASCADE ON UPDATE 
CASCADE) QMYSQL: Unable to execute query
Query: ALTER TABLE PimItemFlagRelation ADD FOREIGN KEY (PimItem_id) REFERENCES 
PimItemTable(id) ON UPDATE CASCADE ON DELETE CASCADE
""
Unable to initialize database.
terminating service threads
terminating connection threads
stopping db process
Application 'akonadiserver' exited normally...

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