Shipyard TG 200m km from Earth

[Detros (OP)]

I forgot to detach newly made ships and sent them on training while they were still in Shipyard TG. Now they are 200m km from Earth.

I can't delete this Shipyard TG and then recreate one with the same name on Earth as other shipyards have tasks assigned to it.
I can't give commands to this Shipyard TG to move back to Earth as other shipyards have tasks assigned to it.

How to get it back?

Or rather, what happens if task group assigned to given shipyard task is not at the same spot when the ship gets completed?
Is new TG made or do the ships just go poof? IIRC fighters do that, don't they?
At Shipyard tasks window I can only change name of the ship, not the assigned TG.

[83athom]

A second "Shipyard TG" is created. You can move the original back to Earth either via orders or SM, then merge it with the new group.

[MarcAFK]

You can detach the ships from that group and send them somewhere else, you can also use spacemaster to move the shipyard taskgroup itself.