diff --git a/Cargo.toml b/Cargo.toml
index a1b9091..d3bbd44 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["RakuJa"]
 
 # Compiler info
 edition = "2021"
-rust-version = "1.75.0"
+rust-version = "1.79.0"
 
 description = "Beyond Your Bestiary Explorer (BYBE) is a web service that provides tools to help Pathfinder 2e Game Masters."
 readme = "README.md"
@@ -39,8 +39,8 @@ sqlx = { version = "0.8.2", features = ["runtime-async-std", "sqlite"] }
 cached = { version = "0.54.0", features = ["async"] }
 
 anyhow = "1.0.93"
-serde = { version = "1.0.214", features = ["derive"] }
-serde_json = "1.0.132"
+serde = { version = "1.0.215", features = ["derive"] }
+serde_json = "1.0.133"
 strum = {version="0.26.3", features = ["derive"]}
 fastrand = "2.2.0"
 counter = "0.6.0"
@@ -56,6 +56,7 @@ dotenvy = "0.15.7"
 env_logger = "0.11.5"
 log = "0.4.22"
 once_cell = "1.20.2"
+once = "0.3.4"
 
 [build-dependencies]
 tokio = { version = "1", features = ["macros", "rt-multi-thread", "rt"] }
diff --git a/src/db/cr_core_initializer.rs b/src/db/cr_core_initializer.rs
index 4076d8e..a4c5c60 100644
--- a/src/db/cr_core_initializer.rs
+++ b/src/db/cr_core_initializer.rs
@@ -9,12 +9,14 @@ use crate::models::creature::creature_metadata::type_enum::CreatureTypeEnum;
 use crate::models::shared::rarity_enum::RarityEnum;
 use crate::models::shared::size_enum::SizeEnum;
 use anyhow::{bail, Result};
+use once::assert_has_not_been_called;
 use serde::{Deserialize, Serialize};
 use sqlx::{FromRow, Pool, Sqlite};
 
-/// Handler for startup, first creature_core initialization. Then it shouldn't be used
-
 pub async fn update_creature_core_table(conn: &Pool<Sqlite>) -> Result<()> {
+    assert_has_not_been_called!(
+        "Handler for startup, first creature_core initialization. Then it shouldn't be used"
+    );
     let scales = fetch_creature_scales(conn).await?;
     for cr in get_creatures_raw_essential_data(conn, 0, -1).await? {
         let traits = fetch_creature_traits(conn, cr.id).await?;