Se edita SYS1.PARMLIB(SMFPRM00)
cambiando el valor de SID
(en rojo):
OPT=2, SYSTEM,JOB AND STEP DATA COLLECTION
EXT=YES, USER EXITS ARE TO BE TAKEN
JWT=60, MAXIMUM WAIT TIME IS 60 MINS
BUF=8192, an 8192 byte buffer is defined
SID=TK4-, system id is TK4-,
OPI=NO, No OPERATOR INTERVENTION
DSV=3, collect data set and volume information
MAN=ALL USER AND SYSTEM RECORDS PERMITTED
Luego se reformatea JES2, y ya estará actualizado.