This mod is fully compatible with 2.0+

This mod changes the Old Maelstrom Field Jacket (Items.Jacket_04_old_01) to it's pre-1.3 apperance. It acts as a complete drop-in replacement.

the easy explanation
In patch 1.3, the Old Maelstrom Field Jacket had it's branding on the back changed from the "Santa Muerte" logo (also found on some tank tops and can generally be found in clothing from the Heywood area) to the "Burn Corpo Shit" logo. As far as I'm aware, this was not mentioned in any changelogs, and instead was left up to players to figure out.

What this mod does is change the jacket back to it's pre-1.3 appearance. It's a drop-in, so it doesn't add any new items and due to the nature of this mod, you don't need TweakXL or ArchiveXL either (it doesn't add any new resources). You'll need a nulled cookedmlsetup mod. I've added an mod that does this for you as a dependency, but if you have one already installed, you don't need it. (If you're not sure, just install it).

If you want to quickly get the Old Maelstrom Field Jacket to test if it works, run Game.AddToInventory(Items.Jacket_04_old_01) in CET and it should show up in your inventory.

the slightly more technical details
This mod changes the leather_black_worn.mlsetup file (in the archive/base/characters/garment/gang_6thstreet/torso/t2_115_jacket__military/textures folder). Specifically, it adjusts some keys in the 16th layer of the mlsetup, which is where the back decal for the jacket is located. In 1.3, CDPR updated the microblendOffsetU and microblendOffsetV keys to change the back decal. This mod simply places those values back to their pre-1.3 version.