diff --git a/sigi/apps/utils/admin.py b/sigi/apps/utils/admin.py
index a444852..598da0c 100644
--- a/sigi/apps/utils/admin.py
+++ b/sigi/apps/utils/admin.py
@@ -79,7 +79,7 @@ class CronjobAdmin(admin.ModelAdmin):
         "digest",
         "last_digest",
     ]
-    readonly_fields = ("job_name", "app_name", "get_help")
+    readonly_fields = ("job_name", "app_name", "get_help", "last_digest")
     inlines = [JobScheduleInline]
 
     def get_urls(self):
diff --git a/sigi/apps/utils/migrations/0006_remove_jobschedule_enviado_cronjob_last_digest.py b/sigi/apps/utils/migrations/0006_remove_jobschedule_enviado_cronjob_last_digest.py
new file mode 100644
index 0000000..fa4e15c
--- /dev/null
+++ b/sigi/apps/utils/migrations/0006_remove_jobschedule_enviado_cronjob_last_digest.py
@@ -0,0 +1,24 @@
+# Generated by Django 5.0.6 on 2024-08-13 13:35
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("utils", "0005_cronjob_destinatario_email_cronjob_digest_and_more"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="jobschedule",
+            name="enviado",
+        ),
+        migrations.AddField(
+            model_name="cronjob",
+            name="last_digest",
+            field=models.DateTimeField(
+                blank=True, null=True, verbose_name="último envio de digest"
+            ),
+        ),
+    ]
diff --git a/sigi/apps/utils/models.py b/sigi/apps/utils/models.py
index feb8c79..59d720e 100644
--- a/sigi/apps/utils/models.py
+++ b/sigi/apps/utils/models.py
@@ -1,6 +1,7 @@
 import io
 from contextlib import redirect_stderr, redirect_stdout
 from cron_converter import Cron
+from pyexpat import model
 from django.db import models
 from django.contrib.auth.models import Group
 from django.utils import timezone