Bug: Error linking the Discord account

[Alex-Kuzm]

Summary

When trying to link a Discord account with another profile to the profile, it returns the error "discord_id has been taken"

Reproduction steps

1. The profile is registered via email and password
2. Another profile has already been registered through the Discord account that we will use to link to the profile.
3. In the profile settings, click "Link Discord"
4. Log in through the Discord window

Expected result

Returns the error "User with [id] already registered."

Actual result

Returns the error "discord_id has been taken"

Browsers

Chrome 138.0.7204.158 (Official build) (64 bit)

OS

Windows 11 24H2

Current version: 376ef8e