diff --git a/database/migrations/2023_10_20_075853_cisco_asa_add_default_limits.php b/database/migrations/2023_10_20_075853_cisco_asa_add_default_limits.php
new file mode 100644
index 0000000000..2739b6c112
--- /dev/null
+++ b/database/migrations/2023_10_20_075853_cisco_asa_add_default_limits.php
@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('ciscoASA', function (Blueprint $table) {
+            $table->bigInteger('high_alert')->default(-1)->change();
+            $table->bigInteger('low_alert')->default(0)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('ciscoASA', function (Blueprint $table) {
+            $table->bigInteger('high_alert')->change();
+            $table->bigInteger('low_alert')->change();
+        });
+    }
+};
diff --git a/misc/db_schema.yaml b/misc/db_schema.yaml
index 78d9214087..8181efde9d 100644
--- a/misc/db_schema.yaml
+++ b/misc/db_schema.yaml
@@ -428,8 +428,8 @@ ciscoASA:
     - { Field: device_id, Type: 'int unsigned', 'Null': false, Extra: '' }
     - { Field: oid, Type: varchar(255), 'Null': false, Extra: '' }
     - { Field: data, Type: bigint, 'Null': false, Extra: '' }
-    - { Field: high_alert, Type: bigint, 'Null': false, Extra: '' }
-    - { Field: low_alert, Type: bigint, 'Null': false, Extra: '' }
+    - { Field: high_alert, Type: bigint, 'Null': false, Extra: '', Default: '-1' }
+    - { Field: low_alert, Type: bigint, 'Null': false, Extra: '', Default: '0' }
     - { Field: disabled, Type: tinyint, 'Null': false, Extra: '', Default: '0' }
   Indexes:
     PRIMARY: { Name: PRIMARY, Columns: [ciscoASA_id], Unique: true, Type: BTREE }