Why did constants stop working for me?

Question

PHP

I have such a problem, everything worked fine before, but now an error occurs Undefined class constant 'WHOLESALE' (0)
. This goes out to the virtual machine, but everything works fine on the server. I don’t even understand what could be the matter and why it suddenly stopped working.
My code
Here I am declaring and the error refers to it

in_array($USER::WHOLESALE, $USER->GetUserGroupArray())

And in the USER class I declare it

abstract class CAllUser extends CDBResult
{
    const WHOLESALE = 6;//Оптовик
....

Answer 1

And if so?
CUser inherits CAllUser? Apparently not.
Yuzay example above