diff --git a/db/routines/vn/procedures/clean.sql b/db/routines/vn/procedures/clean.sql
index 6552d84cb2..36ef85834d 100644
--- a/db/routines/vn/procedures/clean.sql
+++ b/db/routines/vn/procedures/clean.sql
@@ -132,7 +132,7 @@ BEGIN
 	DELETE e
 		FROM entry e
 			JOIN tEntryToDelete tmp ON tmp.id = e.id
-		WHERE e.isBooked = FALSE;
+		WHERE NOT e.isBooked;
 
 	-- borrar de route registros menores a 4 años
 	CREATE OR REPLACE TEMPORARY TABLE tRouteToDelete