diff --git a/cave_data/1623-161.html b/cave_data/1623-161.html
index ef4bf975b..8f06f7410 100644
--- a/cave_data/1623-161.html
+++ b/cave_data/1623-161.html
@@ -17,6 +17,7 @@ the form documented at
 
 <cave>
 <non_public>False</non_public>
+<unexplored>False</unexplored>
 
 <official_name>Kaninchenh&ouml;hle</official_name>
 <area>1623</area>
@@ -129,7 +130,7 @@ of what appears to have been very large trunk passage below 1300m in Siberia, bu
 overview is currently mostly updated to reflect exploration to 1995, though the line plots are up to 1996.</underground_description>
 <equipment></equipment>
 <references></references>
-<survey>? grade 5</survey>
+<survey></survey>
 <notes></notes>
 <length>26284m (2017)</length>
 <depth>526m (2017)</depth>