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psalm/docs/running_psalm/issues/OverriddenInterfaceConstant.md

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# OverriddenInterfaceConstant
Emitted when a constant declared on an interface is overridden by a child (illegal in PHP < 8.1).
```php
<?php
interface Foo
{
public const BAR='baz';
}
interface Bar extends Foo
{
public const BAR='foobar';
}
```