diff --git a/doc/1-about.md b/doc/1-about.md
index 6cfbc3e9e..5c5b78ef4 100644
--- a/doc/1-about.md
+++ b/doc/1-about.md
@@ -55,9 +55,10 @@ More details in the [Icinga FAQ](https://www.icinga.org/icinga/faq/).
 
 #### Changes
 
+* [DB IDO schema upgrade](14-upgrading-icinga-2.md#upgrading-icinga-2) to `1.13.0` required!
+
 TODO
 
 #### Issues
 
 TODO
-
diff --git a/doc/14-upgrading-icinga-2.md b/doc/14-upgrading-icinga-2.md
index 329805238..c96745057 100644
--- a/doc/14-upgrading-icinga-2.md
+++ b/doc/14-upgrading-icinga-2.md
@@ -1,4 +1,4 @@
-# Upgrading Icinga 2
+# <a id="upgrading-icinga-2"></a>  Upgrading Icinga 2
 
 Upgrading Icinga 2 is usually quite straightforward. Ordinarily the only manual steps involved
 are scheme updates for the IDO database.
@@ -20,13 +20,13 @@ The Icinga 2 DB IDO module will check for the required database schema version o
 and generate an error message if not satisfied.
 
 
-**Example:** You are upgrading Icinga 2 from version `2.0.2` to `2.2.0`. Look into
+**Example:** You are upgrading Icinga 2 from version `2.0.2` to `2.3.0`. Look into
 the *upgrade* directory:
 
     $ ls /usr/share/icinga2-ido-mysql/schema/upgrade/
-    2.0.2.sql  2.1.0.sql 2.2.0.sql
+    2.0.2.sql  2.1.0.sql 2.2.0.sql 2.3.0.sql
 
-There are two new upgrade files called `2.1.0.sql` and `2.2.0.sql`
+There are two new upgrade files called `2.1.0.sql`, `2.2.0.sql` and `2.3.0.sql`
 which must be applied incrementially to your IDO database.
 
 ## <a id="upgrading-postgresql-db"></a> Upgrading the PostgreSQL database
@@ -46,12 +46,11 @@ Apply all database schema upgrade files incrementially.
 The Icinga 2 DB IDO module will check for the required database schema version on startup
 and generate an error message if not satisfied.
 
-**Example:** You are upgrading Icinga 2 from version `2.0.2` to `2.1.0`. Look into
+**Example:** You are upgrading Icinga 2 from version `2.0.2` to `2.3.0`. Look into
 the *upgrade* directory:
 
     $ ls /usr/share/icinga2-ido-pgsql/schema/upgrade/
-    2.0.2.sql  2.1.0.sql 2.2.0.sql
+    2.0.2.sql  2.1.0.sql 2.2.0.sql 2.3.0.sql
 
-There are two new upgrade files called `2.1.0.sql` and `2.2.0.sql`
+There are two new upgrade files called `2.1.0.sql`, `2.2.0.sql` and `2.3.0.sql`
 which must be applied incrementially to your IDO database.
-
diff --git a/lib/db_ido_mysql/schema/mysql.sql b/lib/db_ido_mysql/schema/mysql.sql
index 9cbaed26b..ea9a4adf6 100644
--- a/lib/db_ido_mysql/schema/mysql.sql
+++ b/lib/db_ido_mysql/schema/mysql.sql
@@ -535,7 +535,7 @@ CREATE TABLE IF NOT EXISTS icinga_hostdependencies (
   fail_on_down smallint default 0,
   fail_on_unreachable smallint default 0,
   PRIMARY KEY  (hostdependency_id),
-  UNIQUE KEY instance_id (instance_id,config_type,host_object_id,dependent_host_object_id,dependency_type,inherits_parent,fail_on_up,fail_on_down,fail_on_unreachable)
+  KEY instance_id (instance_id,config_type,host_object_id,dependent_host_object_id,dependency_type,inherits_parent,fail_on_up,fail_on_down,fail_on_unreachable)
 ) ENGINE=InnoDB COMMENT='Host dependency definitions';
 
 -- --------------------------------------------------------
@@ -1026,7 +1026,7 @@ CREATE TABLE IF NOT EXISTS icinga_servicedependencies (
   fail_on_unknown smallint default 0,
   fail_on_critical smallint default 0,
   PRIMARY KEY  (servicedependency_id),
-  UNIQUE KEY instance_id (instance_id,config_type,service_object_id,dependent_service_object_id,dependency_type,inherits_parent,fail_on_ok,fail_on_warning,fail_on_unknown,fail_on_critical)
+  KEY instance_id (instance_id,config_type,service_object_id,dependent_service_object_id,dependency_type,inherits_parent,fail_on_ok,fail_on_warning,fail_on_unknown,fail_on_critical)
 ) ENGINE=InnoDB COMMENT='Service dependency definitions';
 
 -- --------------------------------------------------------
@@ -1603,6 +1603,6 @@ CREATE INDEX commenthistory_delete_idx ON icinga_commenthistory (instance_id, co
 -- -----------------------------------------
 -- set dbversion
 -- -----------------------------------------
-INSERT INTO icinga_dbversion (name, version, create_time, modify_time) VALUES ('idoutils', '1.12.0', NOW(), NOW()) ON DUPLICATE KEY UPDATE version='1.12.0', modify_time=NOW();
+INSERT INTO icinga_dbversion (name, version, create_time, modify_time) VALUES ('idoutils', '1.13.0', NOW(), NOW()) ON DUPLICATE KEY UPDATE version='1.13.0', modify_time=NOW();
 
 
diff --git a/lib/db_ido_mysql/schema/upgrade/2.3.0.sql b/lib/db_ido_mysql/schema/upgrade/2.3.0.sql
new file mode 100644
index 000000000..4ba629ca1
--- /dev/null
+++ b/lib/db_ido_mysql/schema/upgrade/2.3.0.sql
@@ -0,0 +1,26 @@
+-- -----------------------------------------
+-- upgrade path for Icinga 2.3.0
+--
+-- -----------------------------------------
+-- Copyright (c) 2015 Icinga Development Team (http://www.icinga.org)
+--
+-- Please check http://docs.icinga.org for upgrading information!
+-- -----------------------------------------
+
+-- -----------------------------------------
+-- #7765 drop unique constraint
+-- -----------------------------------------
+
+ALTER TABLE icinga_servicedependencies DROP KEY instance_id;
+ALTER TABLE icinga_hostdependencies DROP KEY instance_id;
+
+ALTER TABLE icinga_servicedependencies ADD KEY instance_id (instance_id,config_type,service_object_id,dependent_service_object_id,dependency_type,inherits_parent,fail_on_ok,fail_on_warning,fail_on_unknown,fail_on_critical);
+ALTER TABLE icinga_hostdependencies ADD KEY instance_id (instance_id,config_type,host_object_id,dependent_host_object_id,dependency_type,inherits_parent,fail_on_up,fail_on_down,fail_on_unreachable);
+
+
+-- -----------------------------------------
+-- update dbversion
+-- -----------------------------------------
+
+INSERT INTO icinga_dbversion (name, version, create_time, modify_time) VALUES ('idoutils', '1.13.0', NOW(), NOW()) ON DUPLICATE KEY UPDATE version='1.13.0', modify_time=NOW();
+
diff --git a/lib/db_ido_pgsql/schema/pgsql.sql b/lib/db_ido_pgsql/schema/pgsql.sql
index 6ce044654..2dfb9d6ae 100644
--- a/lib/db_ido_pgsql/schema/pgsql.sql
+++ b/lib/db_ido_pgsql/schema/pgsql.sql
@@ -562,8 +562,8 @@ CREATE TABLE  icinga_hostdependencies (
   fail_on_down INTEGER  default 0,
   fail_on_unreachable INTEGER  default 0,
   CONSTRAINT PK_hostdependency_id PRIMARY KEY (hostdependency_id) ,
-  CONSTRAINT UQ_hostdependencies UNIQUE (instance_id,config_type,host_object_id,dependent_host_object_id,dependency_type,inherits_parent,fail_on_up,fail_on_down,fail_on_unreachable)
 ) ;
+CREATE INDEX idx_hostdependencies ON icinga_hostdependencies(instance_id,config_type,host_object_id,dependent_host_object_id,dependency_type,inherits_parent,fail_on_up,fail_on_down,fail_on_unreachable);
 
 -- --------------------------------------------------------
 
@@ -1053,8 +1053,8 @@ CREATE TABLE  icinga_servicedependencies (
   fail_on_unknown INTEGER  default 0,
   fail_on_critical INTEGER  default 0,
   CONSTRAINT PK_servicedependency_id PRIMARY KEY (servicedependency_id) ,
-  CONSTRAINT UQ_servicedependencies UNIQUE (instance_id,config_type,service_object_id,dependent_service_object_id,dependency_type,inherits_parent,fail_on_ok,fail_on_warning,fail_on_unknown,fail_on_critical)
 ) ;
+CREATE INDEX idx_servicedependencies ON icinga_servicedependencies(instance_id,config_type,service_object_id,dependent_service_object_id,dependency_type,inherits_parent,fail_on_ok,fail_on_warning,fail_on_unknown,fail_on_critical);
 
 -- --------------------------------------------------------
 
@@ -1633,5 +1633,5 @@ CREATE INDEX commenthistory_delete_idx ON icinga_commenthistory (instance_id, co
 -- set dbversion
 -- -----------------------------------------
 
-SELECT updatedbversion('1.12.0');
+SELECT updatedbversion('1.13.0');
 
diff --git a/lib/db_ido_pgsql/schema/upgrade/2.3.0.sql b/lib/db_ido_pgsql/schema/upgrade/2.3.0.sql
new file mode 100644
index 000000000..d62327399
--- /dev/null
+++ b/lib/db_ido_pgsql/schema/upgrade/2.3.0.sql
@@ -0,0 +1,26 @@
+-- -----------------------------------------
+-- upgrade path for Icinga 2.3.0
+--
+-- -----------------------------------------
+-- Copyright (c) 2015 Icinga Development Team (http://www.icinga.org)
+--
+-- Please check http://docs.icinga.org for upgrading information!
+-- -----------------------------------------
+
+-- -----------------------------------------
+-- #7765 drop unique constraint
+-- -----------------------------------------
+
+ALTER TABLE icinga_servicedependencies DROP CONSTRAINT uq_servicedependencies;
+ALTER TABLE icinga_hostdependencies DROP CONSTRAINT uq_hostdependencies;
+
+CREATE INDEX idx_servicedependencies ON icinga_servicedependencies(instance_id,config_type,service_object_id,dependent_service_object_id,dependency_type,inherits_parent,fail_on_ok,fail_on_warning,fail_on_unknown,fail_on_critical);
+CREATE INDEX idx_hostdependencies ON icinga_hostdependencies(instance_id,config_type,host_object_id,dependent_host_object_id,dependency_type,inherits_parent,fail_on_up,fail_on_down,fail_on_unreachable);
+
+
+-- -----------------------------------------
+-- update dbversion
+-- -----------------------------------------
+
+SELECT updatedbversion('1.13.0');
+