diff --git a/YpDaemon/src/worker/director.rs b/YpDaemon/src/worker/director.rs
index c3d3555..191a867 100644
--- a/YpDaemon/src/worker/director.rs
+++ b/YpDaemon/src/worker/director.rs
@@ -1312,7 +1312,8 @@ impl DirectorWorker {
         new_quantity: i32,
     ) -> Result<(), DbError> {
         conn.prepare("update_inventory_qty", QUERY_UPDATE_INVENTORY_QTY)?;
-        conn.execute("update_inventory_qty", &[&inventory_id, &new_quantity])?;
+        // SQL: UPDATE inventory SET quantity = $1 WHERE id = $2
+        conn.execute("update_inventory_qty", &[&new_quantity, &inventory_id])?;
 
         Ok(())
     }
diff --git a/src/worker/director.rs b/src/worker/director.rs
index 4547517..83afff0 100644
--- a/src/worker/director.rs
+++ b/src/worker/director.rs
@@ -1340,7 +1340,8 @@ impl DirectorWorker {
         new_quantity: i32,
     ) -> Result<(), DbError> {
         conn.prepare("update_inventory_qty", QUERY_UPDATE_INVENTORY_QTY)?;
-        conn.execute("update_inventory_qty", &[&inventory_id, &new_quantity])?;
+        // SQL: UPDATE inventory SET quantity = $1 WHERE id = $2
+        conn.execute("update_inventory_qty", &[&new_quantity, &inventory_id])?;
 
         Ok(())
     }