https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0061165
PI58613: ADD PORTLETID OPTION TO WCM ADDITIONAL CACHE KEYS - Customer Support
A fix is available Fixes integrated inHCL Portal Server 8.5.0.0 and V9.0 Combined Cumulative Fixes APAR
cache keyscustomer supportaddoptionwcm