v.25.2Backward Incompatible Changes
Change Default of format_alter_operations_with_parentheses to True, Affects Replication in Older Clusters
Change the format_alter_operations_with_parentheses default to true to disambiguate the ALTER commands list (see https://github.com/ClickHouse/ClickHouse/pull/59532). This breaks replication with clusters prior to 24.3. If you are upgrading a cluster using older releases turn off the setting in the server config or upgrade to 24.3 first. #75302 (Raúl Marín).