Help! I picked up this graptosedum today. It was overgrown (with like 8 plants growing in the same pot - from budding and leaves broken off). When I went to separate the plants and repot I found that the innermost leaves had raised green bumps on them. There's several on the stems as well. How can I treat this? They're in quarantine at the moment.

One of the worst leaves...

Bump on the stem of one of the cuttings...

The main stem...

Any help in identifying or treating would be greatly appreciated! I'd hate to throw out so many otherwise happy plants...