Add a note that the users do not need to compact the store prior to running neo4j-admin database migrate (#1679) (#1685)

Co-authored-by: Reneta Popova <reneta.popova@neo4j.com>

Author: NataliaIvakina

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

@@ -74,16 +74,23 @@ Changing the store format of an existing database in a standalone server require
 The following steps assume that you want to migrate the database called `mydb` to `block` format but the same steps apply to other formats.
 
 . Stop the database using the Cypher command `STOP DATABASE mydb`.
-. Change the store format of the stopped database using one of the following options:
+. Change the store format of the stopped database using *one* of the following options:
 
 * Migrate an existing database using xref:tools/neo4j-admin/migrate-database.adoc[`neo4j-admin database migrate`] command.
++
+[IMPORTANT]
+====
+You do not need to run `neo4j-admin database copy` with the `--compact-node-store` option prior to running `neo4j-admin database migrate`.
+The database is inherently compacted during the migration process.
+====
++
 For example:
 +
 [source,shell]
 ----
 bin/neo4j-admin database migrate --to-format="block" mydb
 ----
-+
+
 * Pass the new store format as an argument when using the xref:backup-restore/copy-database.adoc[`neo4j-admin database copy`] command to create a copy of an existing database.
 For example:
 +
@@ -131,6 +138,12 @@ bin/neo4j-admin database restore --from-path=/path/to/your-backup-folder/mydb-20
 ----
 . Migrate the restored database to `block` format:
 +
+[IMPORTANT]
+====
+You do not need to run `neo4j-admin database copy` with the `--compact-node-store` option prior to running `neo4j-admin database migrate`.
+The database is inherently compacted during the migration process.
+====
++
 [source,shell]
 ----
 bin/neo4j-admin database migrate --to-format="block" mydb