There is no issue from BPMN side.The error is coming from your database table .If possible please share the table structure with us.
Thank for quickly answer my question.
I create database from script download from jboss-bpmsuite-6.4.0.GA-supplementary-tools.zip(Red Hat JBoss BPM Suite Download | Red Hat Developers)
I used default and don't edit any table, sequence, index,...
I solved error. Sorry, i don't configure persistence.xml
Thanks all for your help.