• The currently available "jbpm-6.1-to-6.2.sql" DB upgrade script [1] does not contain the necessary "ALTER" statement to update an existing database schema with the newly added "owner_id" column from "ContextMappingInfo" table, introduced in jBPM6.1 .
• In fact none of the currently available upgrade scripts [2] contain the necessary SQL statement to add this new column as part of upgrade process.

[1] https://github.com/droolsjbpm/jbpm/blob/master/jbpm-installer/db/upgrade-scripts/jbpm-6.1-to-6.2.sql
[2] https://github.com/droolsjbpm/jbpm/tree/master/jbpm-installer/db/upgrade-scripts