diff --git a/src/Worker/UpdateBlockedServers.php b/src/Worker/UpdateBlockedServers.php
index d2b5255d59..980897939c 100644
--- a/src/Worker/UpdateBlockedServers.php
+++ b/src/Worker/UpdateBlockedServers.php
@@ -57,8 +57,8 @@ class UpdateBlockedServers
 
 		if (DI::config()->get('system', 'delete-blocked-servers')) {
 			Logger::info('Delete blocked servers - start');
-			DBA::p("DELETE FROM `gserver` WHERE `blocked` AND NOT EXISTS(SELECT `gsid` FROM `inbox-status` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `contact` WHERE gsid= `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `apcontact` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `delivery-queue` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `diaspora-contact` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gserver-id` FROM `gserver-tag` WHERE `gserver-id` = `gserver`.`id`)");
-			Logger::info('Delete blocked servers - done', ['rows' => DBA::affectedRows()]);
+			$ret = DBA::delete('gserver', ["`blocked` AND NOT EXISTS(SELECT `gsid` FROM `inbox-status` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `contact` WHERE gsid= `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `apcontact` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `delivery-queue` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gsid` FROM `diaspora-contact` WHERE `gsid` = `gserver`.`id`) AND NOT EXISTS(SELECT `gserver-id` FROM `gserver-tag` WHERE `gserver-id` = `gserver`.`id`)"]);
+			Logger::info('Delete blocked servers - done', ['ret' => $ret, 'rows' => DBA::affectedRows()]);
 		}
 	}
 }
diff --git a/static/defaults.config.php b/static/defaults.config.php
index 14e6d6f0ed..4fb96cfce2 100644
--- a/static/defaults.config.php
+++ b/static/defaults.config.php
@@ -238,7 +238,7 @@ return [
 		'delete_sleeping_processes' => false,
 
 		// delete-blocked-servers (Boolean)
-		// Delete blocked servers if possible.
+		// Delete blocked servers if there are no foreign key violations.
 		'delete-blocked-servers' => false,
 
 		// dice_profiler_threshold (Float)