diff --git a/src/main/java/org/gcube/datacatalogue/common/Constants.java b/src/main/java/org/gcube/datacatalogue/common/Constants.java
index b57b75b..31e8ae8 100644
--- a/src/main/java/org/gcube/datacatalogue/common/Constants.java
+++ b/src/main/java/org/gcube/datacatalogue/common/Constants.java
@@ -103,8 +103,6 @@ public class Constants {
 	public static final String FLAG_STATE_JSON_KEY = "flag_state";
 	public static final String JURISDICTION_AREA_CUSTOM_KEY = "Jurisdiction Area";
 	public static final String JURISDICTION_AREA_JSON_KEY = "jurisdiction_area";
-	public static final String PRODUCTION_SYSTEM_TYPE_CUSTOM_KEY = "Type of Production System";
-	public static final String PRODUCTION_SYSTEM_TYPE_JSON_KEY = "production_system_type";
 	public static final String FISHING_GEAR_CUSTOM_KEY = "Fishing gear";
 	public static final String FISHING_GEAR_JSON_KEY = "fishing_gear";