diff --git a/app/services/json_generator.py b/app/services/json_generator.py
index 99f80e0..8b315bc 100644
--- a/app/services/json_generator.py
+++ b/app/services/json_generator.py
@@ -22,9 +22,9 @@ def _fmt_datetime(val) -> str:
         return ""
     if hasattr(val, "strftime"):
         return val.strftime("%d/%m/%Y %H:%M:%S")
-    # Eliminar espacios dentro de la parte de hora ("06: 08: 29" → "06:08:29")
-    s = str(val)[:19].replace("T", " ")
-    s = s.replace(": ", ":").replace(" :", ":")
+    # Eliminar espacios dentro de la hora ANTES de truncar ("06: 59: 28" → "06:59:28")
+    s = str(val).replace(": ", ":").replace(" :", ":")
+    s = s[:19].replace("T", " ")
     parts = s.split(" ")
     if len(parts) == 2:
         dp = parts[0].split("-")