How can I transport a terrian parented to workspace from game to another

[quxplayz (Cybersurge)]

Basically, I’m trying to copy my workspace which has some terrians. I’m copying it from my actual game to some testing place but then a message like this pops up

[roleplayer1399 (Lorenzo)]

Not sure but maybe you can try to use plugins or disable the beta feature of terrain tools to copy and paste terrains.