Iam not able to login to bastion server-permission denied error

Question

When I login to bastion server every time, there is initial shell script which will run and records sessions.

if [[ -z $SSH_ORIGINAL_COMMAND ]]; then

  LOG_FILE="`date --date="today" "+%Y-%m-%d_%H-%M-%S"`_`whoami`"
  LOG_DIR="/var/log/ssh-bastion/"

  echo ""
  echo "NOTE: This SSH session will be recorded"
  echo "AUDIT KEY: $LOG_FILE"
  echo ""

  # suffix the log file name with a random string.
  SUFFIX=`mktemp -u _XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX`

  script -qf --timing=$LOG_DIR$LOG_FILE$SUFFIX.time $LOG_DIR$LOG_FILE$SUFFIX.data --command=/bin/bash

else
  echo "This bastion supports interactive sessions only. Do not supply a command"
  exit 1

fi

Now when I try to login its giving below error

script: cannot open /var/log/ssh-bastion/2024-03-29_06-52-11_username_m8hI1GxwGYd5847vhanBcn9Www1Koq8X.data: Permission denied

It was working well earlier and I have been facing this issue since 2 days. All my directory permissions are same and there is no change in any file/directory permissions.