The release notes contained within the jbpm-jpdl-3.2.3.zip provide migration notes (from 3.1.x to 3.2.x) that are no longer relevant...

• The DUEDATE_ should not be declared as a timestamp; it should be declared as a datetime
• The LOCKTIME_ should not be declared as a timestamp; it should be declared as a datetime
• The RETRIES_ value should be set to 1 (not 0) as part of the insert statement (which migrates the data from jbpm_timer to jbmp_job)
• Foreign keys should be created