Forge mod loader detected that the backup level.dat is being used

[Andi_2712]

Title:

Forge mod loader detected that the backup level.dat is being used​

Launcher Version:

1.4.12​

Modpack:

ftb Infinity Evolved​

Modpack Version:

2.5.0​

Log Link:

http://paste.feed-the-beast.com/view/ae86e22b​

Details of the issue:

Error shows up by loading my SP World​