[keycloak-user] Cannot add custom Key2StringMapper for JDBC cache store

Resend my previous email... Hi Guys, I am trying to add JDBC cache store via standalone-ha.xml in Keycloak 6.0.1, which has WildFly 16 and Infinispan 9.4.x subsystem. I managed to add the configuration to bind tables in Mysql db, but got the "org.infinispan.persistence.keymappers.UnsupportedKeyTypeException: Unsupported key type" when it tried to save the session. I checked out Infinispan and WF documentations, but the solution they gave, e.g. add "<property name="key2StringMapperClass">...</property>" , does not work. Any help would be appreciated. Thanks!!