diff --git a/htdocs/core/lib/functions2.lib.php b/htdocs/core/lib/functions2.lib.php
index 00deffe10ad..d6149ce89e1 100644
--- a/htdocs/core/lib/functions2.lib.php
+++ b/htdocs/core/lib/functions2.lib.php
@@ -1000,12 +1000,12 @@ function get_next_value($db, $mask, $table, $field, $where = '', $objsoc = '', $
 		$maskuser_value = '';
 	}
 
-	// Personalized field {XXX-1} à {XXX-9}
+	// Personalized field {XXX-1} à {XXX-99}
 	$maskperso = array();
 	$maskpersonew = array();
 	$tmpmask = $mask;
 	$regKey = array();
-	while (preg_match('/\{([A-Z]+)\-([1-9])\}/', $tmpmask, $regKey)) {
+	while (preg_match('/\{([A-Z]+)\-([0-9]+)\}/', $tmpmask, $regKey)) {
 		$maskperso[$regKey[1]] = '{'.$regKey[1].'-'.$regKey[2].'}';
 		// @phan-suppress-next-line PhanParamSuspiciousOrder
 		$maskpersonew[$regKey[1]] = str_pad('', (int) $regKey[2], '_', STR_PAD_RIGHT);