diff --git a/.manus/db/db-query-1769371508542.json b/.manus/db/db-query-1769371508542.json
new file mode 100644
index 0000000..2d98a2b
--- /dev/null
+++ b/.manus/db/db-query-1769371508542.json
@@ -0,0 +1,9 @@
+{
+  "query": "ALTER TABLE presences ADD COLUMN IF NOT EXISTS commentaire TEXT;",
+  "command": "mysql --batch --raw --column-names --default-character-set=utf8mb4 --host gateway02.us-east-1.prod.aws.tidbcloud.com --port 4000 --user 4CrrYuB5tme73Qo.root --database 7PAT67UmWoxv8vwp8Bbcv6 --execute ALTER TABLE presences ADD COLUMN IF NOT EXISTS commentaire TEXT;",
+  "rows": [],
+  "messages": [],
+  "stdout": "",
+  "stderr": "",
+  "execution_time_ms": 1412
+}
\ No newline at end of file
diff --git a/server/presenceDb.ts b/server/presenceDb.ts
index 9ea0135..602e7a8 100644
--- a/server/presenceDb.ts
+++ b/server/presenceDb.ts
@@ -1,4 +1,4 @@
-import { eq, and } from "drizzle-orm";
+import { eq, and, sql } from "drizzle-orm";
 import { presences, inscriptions, datesFormation, sequences, apprenants } from "../drizzle/schema";
 import { getDb } from "./db";
 
@@ -24,7 +24,7 @@ export async function validerPresence(params: {
       and(
         eq(presences.inscriptionId, params.inscriptionId),
         eq(presences.dateFormationId, params.dateFormationId),
-        eq(presences.periode, params.periode)
+        sql`${presences.periode} = ${params.periode}`
       )
     );