diff --git a/src/wp-admin/includes/upgrade.php b/src/wp-admin/includes/upgrade.php
index d9ec48632f..77487ba2cb 100644
--- a/src/wp-admin/includes/upgrade.php
+++ b/src/wp-admin/includes/upgrade.php
@@ -836,7 +836,7 @@ function upgrade_all() {
 		upgrade_530();
 	}
 
-	if ( $wp_current_db_version < 48121 ) {
+	if ( $wp_current_db_version < 48575 ) {
 		upgrade_550();
 	}
 
@@ -2182,10 +2182,14 @@ function upgrade_550() {
 		delete_option( 'comment_whitelist' );
 	}
 
-	if ( $wp_current_db_version < 48572 ) {
+	if ( $wp_current_db_version < 48575 ) {
 		// Use more clear and inclusive language.
 		$disallowed_list = get_option( 'blacklist_keys' );
 
+		/*
+		 * This option key was briefly renamed `blocklist_keys`.
+		 * Account for sites that have this key present when the original key does not exist.
+		 */
 		if ( false === $disallowed_list ) {
 			$disallowed_list = get_option( 'blocklist_keys' );
 		}
diff --git a/src/wp-includes/version.php b/src/wp-includes/version.php
index 4764c8c5cb..6e6354d152 100644
--- a/src/wp-includes/version.php
+++ b/src/wp-includes/version.php
@@ -20,7 +20,7 @@ $wp_version = '5.5-beta3-48551-src';
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 48397;
+$wp_db_version = 48575;
 
 /**
  * Holds the TinyMCE version.