diff --git a/schema/mysql-migrations/upgrade_152.sql b/schema/mysql-migrations/upgrade_152.sql
new file mode 100644
index 00000000..91e8eea3
--- /dev/null
+++ b/schema/mysql-migrations/upgrade_152.sql
@@ -0,0 +1,9 @@
+ALTER TABLE import_source
+  ADD UNIQUE INDEX source_name (source_name);
+
+ALTER TABLE sync_rule
+  ADD UNIQUE INDEX rule_name (rule_name);
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES (152, NOW());
diff --git a/schema/mysql.sql b/schema/mysql.sql
index ee314a04..6a87b13e 100644
--- a/schema/mysql.sql
+++ b/schema/mysql.sql
@@ -1296,6 +1296,7 @@ CREATE TABLE import_source (
   last_attempt DATETIME DEFAULT NULL,
   description TEXT DEFAULT NULL,
   PRIMARY KEY (id),
+  UNIQUE INDEX source_name (source_name),
   INDEX search_idx (key_column)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
@@ -1441,7 +1442,8 @@ CREATE TABLE sync_rule (
   last_error_message TEXT DEFAULT NULL,
   last_attempt DATETIME DEFAULT NULL,
   description TEXT DEFAULT NULL,
-  PRIMARY KEY (id)
+  PRIMARY KEY (id),
+  UNIQUE INDEX rule_name (rule_name)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 CREATE TABLE sync_property (
@@ -1730,4 +1732,4 @@ CREATE TABLE icinga_timeperiod_exclude (
 
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (151, NOW());
+  VALUES (152, NOW());
diff --git a/schema/pgsql-migrations/upgrade_152.sql b/schema/pgsql-migrations/upgrade_152.sql
new file mode 100644
index 00000000..b1d816c0
--- /dev/null
+++ b/schema/pgsql-migrations/upgrade_152.sql
@@ -0,0 +1,7 @@
+CREATE UNIQUE INDEX import_source_name ON import_source (source_name);
+
+CREATE UNIQUE INDEX sync_rule_name ON sync_rule (rule_name);
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+VALUES (152, NOW());
diff --git a/schema/pgsql.sql b/schema/pgsql.sql
index 962b98c5..93618733 100644
--- a/schema/pgsql.sql
+++ b/schema/pgsql.sql
@@ -1439,6 +1439,7 @@ CREATE TABLE import_source (
 );
 
 CREATE INDEX import_source_search_idx ON import_source (key_column);
+CREATE UNIQUE INDEX import_source_name ON import_source (source_name);
 
 
 CREATE TABLE import_source_setting (
@@ -1594,6 +1595,7 @@ CREATE TABLE sync_rule (
   PRIMARY KEY (id)
 );
 
+CREATE UNIQUE INDEX sync_rule_name ON sync_rule (rule_name);
 
 CREATE TABLE sync_property (
   id serial,
@@ -2025,4 +2027,4 @@ CREATE TABLE icinga_timeperiod_exclude (
 
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (151, NOW());
+  VALUES (152, NOW());