error when running forge modded server

[pooyarezaee]

hi. i'm trying to start a modded minecraft server. and server wont run. this is the log. can you help me find out what's the problem?

https://www.dropbox.com/s/nv2du824zvs64ur/fml-server-latest.log?dl=0

 

[Choonster]

Reika.DragonAPI.Exception.IDConflictException: The mods were not installed correctly:

CONFLICT: Potion IDs: am2.buffs.ArsMagicaPotion@3aacf8f4 @ 35 (ArsMagicaPotion & FreezePotion)

Check your IDs and change them if possible.

This is NOT a mod bug. Do not post it or ask for support or you will look lazy or extremely foolish..

 

One of Ars Magica 2's potions is configured with the same ID as RotaryCraft's Freeze potion (ID 35). Edit the potion IDs in the config file of either mod so they don't conflict.

 

If you can get a client running with the same mods (after fixing any potion ID conflicts from Reika's mods), NEI can tell you which potion IDs are being used and which are free: open your inventory, then go to Options -> Tools -> Data Dumps and click "Dump" next to "Potions".