diff --git a/wp-admin/includes/upgrade.php b/wp-admin/includes/upgrade.php
index 82fda9682f..dfe38d29e3 100644
--- a/wp-admin/includes/upgrade.php
+++ b/wp-admin/includes/upgrade.php
@@ -2891,27 +2891,29 @@ function dbDelta( $queries = '', $execute = true ) { // phpcs:ignore WordPress.N
 					// Normalize columns.
 					foreach ( $index_columns as $id => &$index_column ) {
 						// Extract column name and number of indexed characters (sub_part).
+						// phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation
 						preg_match(
 							'/'
-							. '`?'                      // Name can be escaped with a backtick.
-							. '(?P<column_name>'    // 1) Name of the column.
-							. '(?:[0-9a-zA-Z$_-]|[\xC2-\xDF][\x80-\xBF])+'
-							. ')'
-							. '`?'                      // Name can be escaped with a backtick.
-							. '(?:'                     // Optional sub part.
-							. '\s*'                 // Optional white space character between name and opening bracket.
-							. '\('                  // Opening bracket for the sub part.
-							. '\s*'             // Optional white space character after opening bracket.
-							. '(?P<sub_part>'
-							. '\d+'         // 2) Number of indexed characters.
-							. ')'
-							. '\s*'             // Optional white space character before closing bracket.
-							. '\)'                 // Closing bracket for the sub part.
-							. ')?'
+							.   '`?'                      // Name can be escaped with a backtick.
+							.       '(?P<column_name>'    // 1) Name of the column.
+							.           '(?:[0-9a-zA-Z$_-]|[\xC2-\xDF][\x80-\xBF])+'
+							.       ')'
+							.   '`?'                      // Name can be escaped with a backtick.
+							.   '(?:'                     // Optional sub part.
+							.       '\s*'                 // Optional white space character between name and opening bracket.
+							.       '\('                  // Opening bracket for the sub part.
+							.           '\s*'             // Optional white space character after opening bracket.
+							.           '(?P<sub_part>'
+							.               '\d+'         // 2) Number of indexed characters.
+							.           ')'
+							.           '\s*'             // Optional white space character before closing bracket.
+							.       '\)'                  // Closing bracket for the sub part.
+							.   ')?'
 							. '/',
 							$index_column,
 							$index_column_matches
 						);
+						// phpcs:enable
 
 						// Escape the column name with backticks.
 						$index_column = '`' . $index_column_matches['column_name'] . '`';
diff --git a/wp-includes/version.php b/wp-includes/version.php
index f387ce50ec..c40100342c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53895';
+$wp_version = '6.1-alpha-53896';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.