seed and wipe sessions file

data/seedDb.php

@@ -40,6 +40,7 @@ $users = [
 
 $plans = [];
 $scheduledNodes = [];
+$sessions = [];
 
 $fileDataMap = [
     'texts.json' => $texts,
@@ -47,6 +48,7 @@ $fileDataMap = [
     'users.json' => $users,
     'plans.json' => $plans,
     'scheduledNodes.json' => $scheduledNodes,
+    'sessions.json' => $sessions,
 ];
 
 foreach ($fileDataMap as $file => $data) {