Add a note that migration from Aligned with "book tokens" to Block is not supported (#2021)

Co-authored-by: NataliaIvakina <[email protected]>

Author: renetapopova

modules/ROOT/pages/database-internals/store-formats.adoc

@@ -118,12 +118,19 @@ bin/neo4j-admin database copy --to-format="block" mydb blockdb
 CREATE DATABASE blockdb OPTIONS {storeFormat: 'block'}
 ----
 
-
 [[change-store-format]]
 === Changing the store format of existing databases
 
-Starting from 5.23, `block` format is the preferred format for Enterprise Edition due to its superior performance and scalability.
-Therefore, migrating all databases to `block` format is recommended to ensure optimal performance.
+Starting from 5.23, `block` format is the recommended format for Enterprise Edition due to its superior performance and scalability.
+It uses advanced data structures and inlining techniques to enhance data locality, which leads to better resource utilization.
+Therefore, it is highly recommended that Enterprise Edition users migrate all databases to `block` format at their earliest convenience to ensure the best possible performance.
+`block` format is the default format for new databases created in 5.23 and later, and is the default format for all databases in 5.26 and later.
+
+From 5.25 onwards, the `block` format supports token names (including node labels, property keys, and relationship type names) of any length up to the GQL identifier max length of 16,383 characters.
+Thus, token names must adhere to this length limit when migrating from `aligned` to `block` format.
+
+`standard` and `high_limit` formats are deprecated in 5.23 and will be removed in a future release.
+For more information, see <<format-deprecations, Format deprecations>>.
 
 [NOTE]
 ====