OCI-42654
Cannot create JSON-relational duality view 'string': 'string' cannot be used as JSON key name in sub-objects or for non-primary key columns.
Cause
The reserved keyword _id is being used as the JSON key name in sub-objects or for non-primary key columns.
Action
Do not use the reserved name "_id" as the JSON key name in sub-objects or for non-primary key columns.