Upgrade from vcenter 5.5u3 to 6.0 with database error

Hi,

if I upgrade vCenter 5.5 to 6.0 on my Windows Server 2008 R2 then I get this error unfortunately in German:

WARNING: Cannot execute statement(rc=100).

DELETE FROM VPX_TABLE

^^^^^^^^^^

WARNING: Cannot execute statement(rc=100).

DELETE FROM VPX_INDEX_COLUMN

^^^^^^^^^^

WARNING: Cannot execute statement(rc=100).

DELETE FROM VPX_SCHEMA_HASH

^^^^^^^^^^

I have attached the VCDB export log .

I hope someone can help me .

many Thanks