When trying to update one specific column (date) on a specific row, the update produced a -151 issue, updating the key column of the table even though there was no update made to this column. Toad seem to be trying to perform this update by attempting to set values on every single column on the table for that row even though only the one column had changed.
WORKAROUND:
To update to this table, drop the table and associated tablespace, and rebuild everything.
STATUS:
Enhancment Request ST79918 has been submitted to Development for consideration in a future release of Toad for DB2.