volts will not launch

[sean o]

when i launch voltz it says:

forge mod loader has found a problem with your minegraft insulation

you have mod sources that are duplicate in your system

mod id: file name

meckanism: meckanism.jar

meckanism: mekinism-v5.2.0.jar

i hope someone can help me

[Emery_rocks1]

I think that you have to delete on of the duplicates happened to me with the server, but make sure you backup so incase deleting one dosent work ou try with the other.