diff --git a/src/data/translate_usernames_into_participants_data.R b/src/data/translate_usernames_into_participants_data.R
index dab89f94..d6350673 100644
--- a/src/data/translate_usernames_into_participants_data.R
+++ b/src/data/translate_usernames_into_participants_data.R
@@ -21,7 +21,7 @@ prepare_participants_file <- function() {
   pid_format <- "p%03d"
   datetime_format <- "%Y-%m-%d %H:%M:%S"
 
-  participant_data <- read_csv(username_list_csv_location, col_types = "c", progress = FALSE)
+  participant_data <- read_csv(username_list_csv_location, col_types = "cc", progress = FALSE)
   usernames <- participant_data$label
 
   participant_ids <- pull_participants_ids(data_configuration, usernames, participants_container)
@@ -45,7 +45,6 @@ prepare_participants_file <- function() {
     pid = sprintf(pid_format, participant_id),
     start_date = strftime(datetime_start, format=datetime_format, tz = "UTC", usetz = FALSE), #TODO Check what timezone is expected
     end_date = strftime(datetime_end, format=datetime_format, tz = "UTC", usetz = FALSE),
-    empatica_id = "placeholder", #TODO Provide in file?
     device_id = map_chr(device_ids, str_c, collapse = ";"),
     number_of_devices = map_int(device_ids, length),
     fitbit_id = ""