The following scripts use `varchar(64)` as type for `ROOT_PROC_INST_ID_`

• `oracle_engine_7.9_to_7.10.sql`
• `activiti.oracle.create.engine.sql`
• `activiti.oracle.create.decision.history.sql`

All other string-based attributes use `NVARCHAR2` as type.
This was introduced with CAM-9388.

Hint:
There might be more Oracle scripts with this type.

AOP:
This also came up in the following forum post:
https://forum.camunda.org/t/inconsistency-between-oracle-7-11-create-scripts-and-upgrade-scripts/16371