From the source:

In preparation for the next operation phase (OP 1.2a), which is scheduled to start in late summer of this year, the limiter structures have been replaced by a test divertor and all graphite tiles on the baffles and wall protection elements have been installed. This will allow the use of more heating power and access to the required magnetic field configurations.

There's no specific date mentioned, but the PDF does mention 'late summer' of this year.

Looks like they're about halfway along with preparing the graphite tiles for the next phase (4500 out of 8000).