gREEn7o0answered grow question 2 years ago I've not grown autos so may be out to lunch here. But here's my 2 cents.
I would be careful using the same soil as these plants seemed to have an issue with it. I would probably try to figure out what went wrong first.
Was it transplant shock?
Is it possible the pot has been over watered, could be struggling with overly wet soil. Throwing a new seed in there will just cause it to rot too.
Is it possible they are experiencing nutrient or pH lockout? If the soil has an excess of nutrients, or the ph is off the new seeds will sprout, lockout and die off as well.
If you can rule those out, or determine one of those is the cause you can correct the issue and reuse it.
Otherwise I would probably personally avoid reusing unless I had a bunch of seeds and didn't mind possibly losing a couple more.