diff --git a/doc/9-object-types.md b/doc/9-object-types.md
index 61586c5ae..f16d09fab 100644
--- a/doc/9-object-types.md
+++ b/doc/9-object-types.md
@@ -763,7 +763,7 @@ Data Categories:
   DbCatComment         | Comments               | Icinga Web 2
   DbCatDowntime        | Downtimes              | Icinga Web 2
   DbCatEventHandler    | Event handler data     | Icinga Web 2
-  DbCatExternalCommand | External commands      | Icinga Web 2
+  DbCatExternalCommand | External commands      | --
   DbCatFlapping        | Flap detection data    | Icinga Web 2
   DbCatCheck           | Check results          | --
   DbCatLog             | Log messages           | --
@@ -772,6 +772,9 @@ Data Categories:
   DbCatRetention       | Retention data         | Icinga Web 2
   DbCatStateHistory    | Historical state data  | Icinga Web 2
 
+The default value for `categories` includes everything required
+by Icinga Web 2 in the table above.
+
 In addition to the category flags listed above the `DbCatEverything`
 flag may be used as a shortcut for listing all flags.
 
@@ -781,9 +784,6 @@ flag may be used as a shortcut for listing all flags.
 > `DbCatProgramStatus | DbCatState` was deprecated in 2.5 and will
 > be removed in future versions.
 
-External interfaces like Icinga Web 2 require everything except `DbCatCheck`
-and `DbCatLog` which is the default value if `categories` is not set.
-
 ## <a id="objecttype-idopgsqlconnection"></a> IdoPgSqlConnection
 
 IDO database adapter for PostgreSQL.
@@ -852,7 +852,7 @@ Data Categories:
   DbCatComment         | Comments               | Icinga Web 2
   DbCatDowntime        | Downtimes              | Icinga Web 2
   DbCatEventHandler    | Event handler data     | Icinga Web 2
-  DbCatExternalCommand | External commands      | Icinga Web 2
+  DbCatExternalCommand | External commands      | --
   DbCatFlapping        | Flap detection data    | Icinga Web 2
   DbCatCheck           | Check results          | --
   DbCatLog             | Log messages           | --
@@ -861,6 +861,9 @@ Data Categories:
   DbCatRetention       | Retention data         | Icinga Web 2
   DbCatStateHistory    | Historical state data  | Icinga Web 2
 
+The default value for `categories` includes everything required
+by Icinga Web 2 in the table above.
+
 In addition to the category flags listed above the `DbCatEverything`
 flag may be used as a shortcut for listing all flags.
 
@@ -870,9 +873,6 @@ flag may be used as a shortcut for listing all flags.
 > `DbCatProgramStatus | DbCatState` was deprecated in 2.5 and will
 > be removed in future versions.
 
-External interfaces like Icinga Web 2 require everything except `DbCatCheck`
-and `DbCatLog` which is the default value if `categories` is not set.
-
 
 ## <a id="objecttype-influxdbwriter"></a> InfluxdbWriter
 
diff --git a/lib/db_ido/dbconnection.ti b/lib/db_ido/dbconnection.ti
index 55e10881e..77d50f6e5 100644
--- a/lib/db_ido/dbconnection.ti
+++ b/lib/db_ido/dbconnection.ti
@@ -44,7 +44,6 @@ abstract class DbConnection : ConfigObject
 			cat->Add("DbCatComment");
 			cat->Add("DbCatDowntime");
 			cat->Add("DbCatEventHandler");
-			cat->Add("DbCatExternalCommand");
 			cat->Add("DbCatFlapping");
 			cat->Add("DbCatNotification");
 			cat->Add("DbCatProgramStatus");