Gallifrey24601

So I just downloaded a second version of forge because some of the mods I have are older and I'm to lazy to download the latest versions. But anyways, I booted up minecraft after I installed forge, and all I got was Forge Mod Loader has found a problem with your minecraft installation The mods and versions listed below could not be found Forge : minimum version required is 10.13.3.1.1360 The file 'ForgeModLoader-client-0.log' contains more information What does it mean?????