ORA-16731: error executing DBMS_LOGSTDBY.UNSKIP_TXN procedure
Cause: Logical standby database package may not be installed.
Action: Install logical standby database packages and reissue the request.
ORA-16731错误是由于试图使用DBMS_LOGSTDBY.UNSKIP_TXN函数的参数不正确而引发的错误。