diff --git a/dabo/functions/get_vars_from_csv.sh b/dabo/functions/get_vars_from_csv.sh
index 56fb74c..50993f9 100644
--- a/dabo/functions/get_vars_from_csv.sh
+++ b/dabo/functions/get_vars_from_csv.sh
@@ -15,6 +15,7 @@ function get_vars_from_csv {
   f_all_vars="f_market_performance=${f_market_performance}"
 
   # read last 4 lines in array if not given
+  unset f_last_lines_array
   if [ -z "${f_last_lines_array}" ]
   then
     mapfile -t f_last_lines_array < <(tail -n4 "${f_ASSET_HIST_FILE}")