When I Play Minecraft Forge 1.12.1 Then This Error Happens :
mercurius_updater:MercuriusUpdater-1.12.2....jar
mercurius_updater:MercuriusUpdater-1.11....jar
It Was Duplicated MercuriusUpdater
I Never Saw This Error Before Then Im Finding A Help And Even I Try To Reinstall Forge
No Result
Then I Check The Mod File
What I Dont Know Is mod_list.json
When I Firts Time Install Forge There Was This File But No Error
Then I Was Start To Think What Is This File
But Think Nothing Then
Then I Have A Idea I Deleted The mod_list.json The Launch Minecraft Forge 1.12.2
The It Launch !!!
Thats Mean Somwhow mod_list.json Is A Virus For Minecraft But Sometimes Not !!
I Hope This Works For You Guys