diff --git a/backend/open_webui/migrations/versions/8452d01d26d7_add_chat_message_table.py b/backend/open_webui/migrations/versions/8452d01d26d7_add_chat_message_table.py
index c8a3647aec..567f7d673a 100644
--- a/backend/open_webui/migrations/versions/8452d01d26d7_add_chat_message_table.py
+++ b/backend/open_webui/migrations/versions/8452d01d26d7_add_chat_message_table.py
@@ -127,6 +127,11 @@ def upgrade() -> None:
 
             timestamp = message.get("timestamp", now)
 
+            try:
+                timestamp = int(float(timestamp))
+            except Exception as e:
+                timestamp = now
+
             # Normalize timestamp: convert ms to seconds, validate range
             if timestamp > 10_000_000_000:
                 timestamp = timestamp // 1000