The SYSTEM ID is provided to the display in the ISPF panel for CA JMR from the actual spooled output in the DAILY file. The option in PK46OPTN is called SYSTEM=
The default is SYSTEM=47
IBM has moved the word SYSTEM to a different offset in the output. The new value should be:
Once you change this value in the PK46OPTN you should recycle CA JMR to activate the new option.