diff --git a/Store/ChatterStore.cs b/Store/ChatterStore.cs
index b65169f..ba890a6 100644
--- a/Store/ChatterStore.cs
+++ b/Store/ChatterStore.cs
@@ -101,7 +101,7 @@ namespace HermesSocketServer.Store
                 sql = _generator.GeneratePreparedDeleteSql("TtsChatVoice", count, ["userId", "chatterId"]);
 
                 _logger.Debug($"User - Deleting {count} rows from database: {sql}");
-                await _generator.DoPreparedStatement(_database, sql, list, ["id"]);
+                await _generator.DoPreparedStatementRaw(_database, sql, list, ["id"]);
             }
         }
     }
diff --git a/Store/GroupSaveSqlGenerator.cs b/Store/GroupSaveSqlGenerator.cs
index a4064c6..b913dc4 100644
--- a/Store/GroupSaveSqlGenerator.cs
+++ b/Store/GroupSaveSqlGenerator.cs
@@ -30,7 +30,23 @@ namespace HermesSocketServer.Store
                     foreach (var column in columns)
                     {
                         var propValue = columnPropertyRelations[column]!.GetValue(value);
-                        var propType = columnPropertyRelations[column]!.PropertyType;
+                        c.Parameters.AddWithValue(column.ToLower() + valueCounter, propValue ?? DBNull.Value);
+                    }
+                    valueCounter++;
+                }
+            });
+        }
+
+        public async Task DoPreparedStatementRaw<V>(Database database, string sql, IEnumerable<V> values, string[] columns)
+        {
+            await database.Execute(sql, (c) =>
+            {
+                var valueCounter = 0;
+                foreach (var value in values)
+                {
+                    foreach (var column in columns)
+                    {
+                        object? propValue = value;
                         c.Parameters.AddWithValue(column.ToLower() + valueCounter, propValue ?? DBNull.Value);
                     }
                     valueCounter++;
diff --git a/Store/PolicyStore.cs b/Store/PolicyStore.cs
index 59e6254..d2b8b63 100644
--- a/Store/PolicyStore.cs
+++ b/Store/PolicyStore.cs
@@ -107,7 +107,7 @@ namespace HermesSocketServer.Store
                 sql = _generator.GeneratePreparedDeleteSql("GroupPermissionPolicy", count, ["id"]);
 
                 _logger.Debug($"GroupPermissionPolicy - Deleting {count} rows from database: {sql}");
-                await _generator.DoPreparedStatement(_database, sql, list, ["id"]);
+                await _generator.DoPreparedStatementRaw(_database, sql, list.Select(id => new Guid(id)), ["id"]);
             }
         }
     }
diff --git a/Store/UserStore.cs b/Store/UserStore.cs
index b90d855..7d63128 100644
--- a/Store/UserStore.cs
+++ b/Store/UserStore.cs
@@ -102,7 +102,7 @@ namespace HermesSocketServer.Store
                 sql = _generator.GeneratePreparedDeleteSql("User", count, ["id"]);
 
                 _logger.Debug($"User - Deleting {count} rows from database: {sql}");
-                await _generator.DoPreparedStatement(_database, sql, list, ["id"]);
+                await _generator.DoPreparedStatementRaw(_database, sql, list, ["id"]);
             }
         }
     }
diff --git a/Store/VoiceStore.cs b/Store/VoiceStore.cs
index e6b4d35..635f52d 100644
--- a/Store/VoiceStore.cs
+++ b/Store/VoiceStore.cs
@@ -104,7 +104,7 @@ namespace HermesSocketServer.Store
                 sql = _generator.GeneratePreparedDeleteSql("TtsVoice", count, ["id"]);
 
                 _logger.Debug($"User - Deleting {count} rows from database: {sql}");
-                await _generator.DoPreparedStatement(_database, sql, list, ["id"]);
+                await _generator.DoPreparedStatementRaw(_database, sql, list, ["id"]);
             }
         }
     }