That looks like the same error as before. Sure you posted the correct crash log?
Hm wait. Did the server crash on restart? What exactly did crash and when?
In other news:
AmunRa-GC-0.3.7
== Version 0.3.7 ==
- added fog to sky rendering
- added gravity generator (not craftable yet)
- Clean up mothership data and unregister motherships on disconnect. Potentially fixes #8
- Added mehen asteroid belt. It's mostly like the vanilla asteroid belt now, except sentrys
- Heavily nerfed sentrys
- rayguns will now retain enchantments and names on reloading
- enchanting a raygun with efficiency will reduce it's power consumption
- rayguns are craftable with any battery
- cryo guns do double damage against blazes, freeze water into ice and lava into obsidian
- blasters melt ice and snow, evaporate water, and set blocks on fire (note: sentrys use blasters, too)