PUID/PGID are prefixed with 999, container fails to start

[sdamm4z]

Description:
When the environment variables PUID and PGID are set, the container automatically prefixes them with 999.

Example:
PGID: 1001 → becomes 9991001

As a result, the container fails to start with the following error:
groupmod: invalid group ID '9991001'

Expected Behavior:
The container should use the specified PUID and PGID correctly without prepending 999, and start normally.

Steps to Reproduce:

1. Set PUID and PGID in the Docker-Compose or ENV file, e.g., PUID: 1011, PGID: 1001
2. Start the container
3. Observe the error groupmod: invalid group ID '9991001'