ZSH - PATH Duplication : Directory added at end of PATH keeps duplicating when re-opening Terminal Session

I have recently installed PIPX on MAC running Big Sur and ZSH shell. During the install it prompted for the following to be added to the .zshrc file.... # Created by pipx on 2021-03-20 14:22:23 export PATH="$PATH:/Users/xxxx/.local/bin" eval "$(register-python-argcomplete pipx)" Running echo $PATH showed /Users/xxxx/.local/bin added to the end of my PATH variable. However, when I close the terminal and open up a new session, running echo $PATH now shows the location duplicated at the end of the PATH :/Users/xxxx/.local/bin:/Users/xxxx/.local/bin Opening and closing new terminal sessions doesn't seem to create any more additions to PATH it just remains at these 2 entries.... I have run typeset -U PATH path to remove the duplicate but each time I open up new terminal sessions it just duplicates again. Does anybody know how I can stop this from happening.....I would really like to keep my PATH variable as clean as possible.