Remove standalone_xml_history backup files

in my invorinment keycloak is restarting again and again and this restart is generating back up of standalone-ha.xml file under /keycloak_install_dir/tanadalone/configuration/standalone_xml_history directory.

Upon research I found out that we can scrape out these backup files by configuring two system properties : 1 . jboss.config.current-history-length and jboss.config.history-days.
I understood about jboss.config.history-days , but not sure how jboss.config.current-history-length works?

any insights will be helpful.