In OC, for ntevl profile, the Optional Key is limited to 50 char length and cannot add more that 50.
ex: $servicetype/$instance/$nodename/$version/$suppressionkey
It takes the optional key upto: $servicetype/$instance/$nodename/$version/$suppres
Release : 20.3
Component : UIM - MON_CONFIG_SERVICE_TEMPLATES
This was increased to 256 characters in 4.36-SNAPSHOT, which is attached here.