diff --git a/flake.lock b/flake.lock
index 28764fd..1a4c1fd 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1067,6 +1067,22 @@
         "type": "github"
       }
     },
+    "hpcstat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1714874258,
+        "narHash": "sha256-rEyWxfnScWDYW2w3r+aFRGyzC5M/OfNrEKmV9suXyA8=",
+        "owner": "CHN-beta",
+        "repo": "hpcstat",
+        "rev": "3a4ba7a94f6a5c21a6725b9f91c991a2831c6736",
+        "type": "github"
+      },
+      "original": {
+        "owner": "CHN-beta",
+        "repo": "hpcstat",
+        "type": "github"
+      }
+    },
     "impermanence": {
       "locked": {
         "lastModified": 1708968331,
@@ -1612,6 +1628,7 @@
         "fluent-kde": "fluent-kde",
         "gricad": "gricad",
         "home-manager": "home-manager",
+        "hpcstat": "hpcstat",
         "impermanence": "impermanence",
         "kylin-virtual-keyboard": "kylin-virtual-keyboard",
         "lepton": "lepton",
@@ -1641,6 +1658,7 @@
         "nur": "nur",
         "nur-linyinfeng": "nur-linyinfeng",
         "nur-xddxdd": "nur-xddxdd",
+        "openxlsx": "openxlsx",
         "plasma-manager": "plasma-manager",
         "pnpm2nix-nzbr": "pnpm2nix-nzbr",
         "qchem": "qchem",
@@ -1651,15 +1669,16 @@
         "tgbot-cpp": "tgbot-cpp",
         "v-sim": "v-sim",
         "win11os-kde": "win11os-kde",
+        "xmuhpc-dotfiles": "xmuhpc-dotfiles",
         "zpp-bits": "zpp-bits",
         "zxorm": "zxorm"
       },
       "locked": {
-        "lastModified": 1714468512,
-        "narHash": "sha256-7UOlepLVQXlPEqSiTmpDbYgSsgaaXtzhrXMwxv44r4o=",
+        "lastModified": 1714877025,
+        "narHash": "sha256-nWFkYfaTZUzWscxpG7T6QFi4u6bdAbpJOA2KfAtdD+s=",
         "owner": "CHN-beta",
         "repo": "nixos",
-        "rev": "405dc14ce7c3bc04eaafae9b4d0e1cc4102c317b",
+        "rev": "1fe31395f686e440dfa48c9e5e2e55c7f0aac1eb",
         "type": "github"
       },
       "original": {
@@ -2083,6 +2102,22 @@
         "type": "github"
       }
     },
+    "openxlsx": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1656848604,
+        "narHash": "sha256-Bdik5tY6DsNKMMXvfVOHngLHud3OJ8q9OTwv4eaDMvY=",
+        "owner": "troldal",
+        "repo": "OpenXLSX",
+        "rev": "b80da42d1454f361c29117095ebe1989437db390",
+        "type": "github"
+      },
+      "original": {
+        "owner": "troldal",
+        "repo": "OpenXLSX",
+        "type": "github"
+      }
+    },
     "org": {
       "flake": false,
       "locked": {
@@ -2824,6 +2859,22 @@
         "type": "github"
       }
     },
+    "xmuhpc-dotfiles": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1714814038,
+        "narHash": "sha256-jiCdHJ4Sv3NnvW7jf1jLRMD0r4wnmc7LsTAFYszTEeo=",
+        "ref": "refs/heads/main",
+        "rev": "cf24e4352810bd39896e6d4038dd8193539f9862",
+        "revCount": 8,
+        "type": "git",
+        "url": "https://git.chn.moe/chn/xmuhpc-dotfiles.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.chn.moe/chn/xmuhpc-dotfiles.git"
+      }
+    },
     "yafas": {
       "inputs": {
         "flake-schemas": [
@@ -2869,15 +2920,15 @@
     "zxorm": {
       "flake": false,
       "locked": {
-        "lastModified": 1689774784,
-        "narHash": "sha256-QO0jrZqYcYxIdL1EWnEjaODr+q9inlbBgKaDSlu+ot0=",
-        "owner": "crabmandable",
+        "lastModified": 1714876963,
+        "narHash": "sha256-PYUs76SpsbCUHSV8n1+u10U4aEpA0u3L+IEXkRKzMXM=",
+        "owner": "CHN-beta",
         "repo": "zxorm",
-        "rev": "92cd52ec0530fb3e66061058548916fb879879e7",
+        "rev": "c72543439eac41dae7aa44065fee657cad336bab",
         "type": "github"
       },
       "original": {
-        "owner": "crabmandable",
+        "owner": "CHN-beta",
         "repo": "zxorm",
         "type": "github"
       }
diff --git a/src/sql.cpp b/src/sql.cpp
index 7929d82..e8af0e7 100644
--- a/src/sql.cpp
+++ b/src/sql.cpp
@@ -74,7 +74,7 @@ namespace hpcstat::sql
           if (*old_data_it != *new_data_it)
           {
             std::cerr << fmt::format
-              ("Data mismatch: {} {} != {}.\n", nameof::nameof_type<T>(), (*old_data_it).Id, (*new_data_it).Id);
+              ("Data mismatch: {} {} != {}.\n", nameof::nameof_type<T>(), old_data_it->Id, new_data_it->Id);
             return std::nullopt;
           }
         if (old_data_it != old_query.end() && new_data_it == new_query.end())
@@ -90,7 +90,7 @@ namespace hpcstat::sql
             auto data = *old_data_it;
             data.Signature = "";
             data.Id = 0;
-            diff.push_back({ serialize(data), (*old_data_it).Signature, (*old_data_it).Key });
+            diff.push_back({ serialize(data), old_data_it->Signature, old_data_it->Key });
           }
           return diff;
         }