Magisk Has Been Detected — A Su Binary Not From

After deletion, reflash Magisk to reinstall its own clean binary.

With the rise of new root managers like KernelSU (which works at the kernel level) and APatch, some advanced users experiment by installing multiple root solutions. If you installed one, then installed Magisk over it without cleaning first, the system detects binaries from both sources. a su binary not from magisk has been detected

This is the most common cause. Before Magisk became the standard, older methods like SuperSU, KingoRoot, or CF-Auto-Root were widely used. If your device was previously rooted with one of these methods and you tried to install Magisk on top without fully cleaning the previous root, the old su binary files are likely lingering in your system partition. After deletion, reflash Magisk to reinstall its own

Before diving into fixes, it is essential to understand the terminology. This is the most common cause

: You previously used a different rooting tool (like SuperSU) and did not fully unroot.