The same thing happened to mine almost as soon as I got it, since the clip seems to be molded into the arm, you'd have to replace that to fix it properly, but there are clips online that you can 3D print as an alternative, they just clip around the arm.
https://www.thingiverse.com/thing:4424259 < a clip I found on thingaverse
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If you cant fix it, don't worry, like I said mine broke off really early, and that was in 2019, I just bought my first replacement cable just a few weeks ago, and the damage was past the clip.
The same thing happened to mine almost as soon as I got it, since the clip seems to be molded into the arm, you'd have to replace that to fix it properly, but there are clips online that you can 3D print as an alternative, they just clip around the arm.
https://www.thingiverse.com/thing:4424259 < a clip I found on thingaverse