Fix debug log
diff --git a/staffeln/common/lock.py b/staffeln/common/lock.py
index d5d6134..4d60ab1 100644
--- a/staffeln/common/lock.py
+++ b/staffeln/common/lock.py
@@ -43,7 +43,8 @@
         self.acquired = self.lock.acquire(blocking=False)
         if not self.acquired:
             LOG.debug(f"Failed to lock for {self.lock_name}")
-        LOG.debug(f"acquired lock for {self.lock_name}")
+        else:
+            LOG.debug(f"acquired lock for {self.lock_name}")
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):