diff --git a/v2rayN/v2rayN/Handler/ConfigHandler.cs b/v2rayN/v2rayN/Handler/ConfigHandler.cs
index c684acd1..660f12ee 100644
--- a/v2rayN/v2rayN/Handler/ConfigHandler.cs
+++ b/v2rayN/v2rayN/Handler/ConfigHandler.cs
@@ -1194,11 +1194,11 @@ namespace v2rayN.Handler
             }
             if (isSub)
             {
-                SqliteHelper.Instance.Execute($"delete from ProfileItem where isSub = 1 and subid = {subid}");
+                SqliteHelper.Instance.Execute($"delete from ProfileItem where isSub = 1 and subid = '{subid}'");
             }
             else
             {
-                SqliteHelper.Instance.Execute($"delete from ProfileItem where subid = {subid}");
+                SqliteHelper.Instance.Execute($"delete from ProfileItem where subid = '{subid}'");
             }
 
             return 0;
diff --git a/v2rayN/v2rayN/Handler/LazyConfig.cs b/v2rayN/v2rayN/Handler/LazyConfig.cs
index 66d67276..bd2fa7f2 100644
--- a/v2rayN/v2rayN/Handler/LazyConfig.cs
+++ b/v2rayN/v2rayN/Handler/LazyConfig.cs
@@ -92,7 +92,7 @@ namespace v2rayN.Handler
                         where 1=1 ";
             if (!Utils.IsNullOrEmpty(subid))
             {
-                sql += $" and a.subid = {subid}";
+                sql += $" and a.subid = '{subid}'";
             }
             if (!Utils.IsNullOrEmpty(filter))
             {