98. PostgreSQL DBA: How to install and configure PostgreSQL 16 on Kali Linux 2022 / 2023

I get this
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2839 (apt)
N: Be aware that removing the lock file is not a solution and may break your system.
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

sir i have problem when i write select version(); (After installing version 16 and performing all the previous steps) the output is >>> PostgreSQL 15.3 (Debian 15.3-0+deb12u1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit
(1 row)

what should I do pls I need help?/:

thank you