diff --git a/app/boot.py b/app/boot.py
index e8a5cb6f..699fccaa 100644
--- a/app/boot.py
+++ b/app/boot.py
@@ -111,12 +111,10 @@ def add_default_presets():
                                                               {'name': 'depthmap-resolution', 'value': '1000'},
                                                               {'name': 'texturing-nadir-weight', 'value': "28"}]})
         Preset.objects.update_or_create(name='Point of Interest', system=True,
-                                        defaults={'options': [{'name': 'matcher-neighbors', 'value': "24"},
-                                                              {'name': 'mesh-size', 'value': '600000'},
+                                        defaults={'options': [{'name': 'mesh-size', 'value': '600000'},
                                                               {'name': 'use-3dmesh', 'value': True}]})
         Preset.objects.update_or_create(name='Forest', system=True,
                                         defaults={'options': [{'name': 'min-num-features', 'value': "18000"},
-                                                              {'name': 'matcher-neighbors', 'value': "21"},
                                                               {'name': 'texturing-data-term', 'value': "area"}]})
         Preset.objects.update_or_create(name='DSM + DTM', system=True,
                                         defaults={
diff --git a/worker/tasks.py b/worker/tasks.py
index d31d8b4d..70b09cd7 100644
--- a/worker/tasks.py
+++ b/worker/tasks.py
@@ -60,6 +60,8 @@ def cleanup_tmp_directory():
 
 @app.task
 def process_task(taskId):
+    have_lock = False
+
     try:
         lock = redis_client.lock('task_lock_{}'.format(taskId))
         have_lock = lock.acquire(blocking=False)