Oracle Message OCI-19212 - no key columns specified before call to DBMS_XMLSTORE.updateXML()

ERRORno key columns specified before call to DBMS_XMLSTORE.updateXML()
CAUSENo columns were specified as key columns before the call to DBMS_XMLSTORE.updateXML.
ACTIONUse DBMS_XMLSTORE.setKeyColumn() to specify key columns