ORA-61753
EMBEDDED_OID key assignment cannot be used with VARCHAR2 key column for collections with content column of type JSON.
Cause
Collection metadata specified EMBEDDED_OID key assignment with VARCHAR2 key column for a collection with content column of type JSON.
Action
For collections with content column of type JSON and EMBEDDED_OID key assignment, specify RAW as key column type. VARCHAR2 key column type is allowed for collections with content column of type BLOB storing OSON.