See UPDATE.md

Procedure for upgrading to develop (1.9.0) from phpIPAM < v1.9.0

Composer dependencies require PHP8.2+

phpIPAM versions prior to 1.9.0 use a mix of git submodule and composer packages installed in the functions sub-directory.

phpIPAM version 1.9.0 and above switched to composer exclusively for package management in the project root directory.

Before you upgrade to 1.9.0 or above from 1.8.x or below, remove legacy git submodules by running git submodule deinit.

Ensure you have a backup your SQL database and config.php before proceeding

(adjust directories etc. according to your installation):

[root@ipam:/]$ cd /var/www/phpipam
[root@ipam:/var/www/phpipam/]$ git submodule deinit -f --all
Cleared directory 'app/login/captcha'
Cleared directory 'functions/GoogleAuthenticator'
Cleared directory 'functions/LdapRecord'
Cleared directory 'functions/PHPMailer'
Cleared directory 'functions/parsedown'
Cleared directory 'functions/php-saml'
Cleared directory 'functions/qrcodejs'
Cleared directory 'functions/xmlseclibs'

Additionally remove the legacy functions/vendor composer package directory.

(adjust directories etc. according to your installation):

[root@ipam:/]$ cd /var/www/phpipam
[root@ipam:/var/www/phpipam/]$ rm -fr functions/vendor