[Bug]: Problems changing quota to 1 GB

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

When you try to reduce the quota of an account to 1 GB there's a glitch in the GUI that prevents this.
When you start editing the account the value shown in the quota-field is not the current quota of this account but always 1 GB. When you save the changes, the old quota above 1 GB is not changed because if you seleted 1 GB from the drop down or entered 1 GB manually it there is no change to the value that was in this field before.
When you want to reduce the quota of an account wit 5, 10 or more GB to 1 GB you have to first set it to e.g. 5 GB, save the change, do not (!) reload the page, edit the account again and the current 5 GB are shown. If you change the quota to another value than 1 GB, save the changes and reload the page, the error occurs again and there ist 1 GB displayed no matter which quota is assigned to the accunt.

Steps to reproduce

1. Find account with more than 1 GB Quota and less than 1 GB current files
2. Edit this account, there's 1 GB dislayed, you may change it in any way to "1 GB" and save it
3. The account still has the quota it had before editing.

Expected behavior

While editing the account there Quota-field should of course be filled with the current Quota.

Nextcloud Server version

32

Operating system

Other

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Upgraded to a MAJOR version (ex. 31 to 32)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

Error also occurs in Release 31 and both on LDAP and local accounts.

Start by reproducing the quota edit flow described in the issue for an account above 1 GB, then trace the account-editing GUI and its quota handling. Done means the edit field shows the account's current quota and saving a change to 1 GB updates the account; add a regression test if the relevant test location is found.