Do not use an old save file. Map mods permanently alter the game world. Create a new profile specifically for your "ETS2 1.32 Map Mods."
The for Euro Truck Simulator 2 (ETS2) was a major milestone that introduced ownable trailers and a significant rework of Germany. Because of these deep changes to the game's economy and base map, many established map mods required specific updates to remain compatible. Major Map Mod Updates for 1.32 ets2+132+map+mods+updated
For ProMods on 1.32, you must generate a custom "def" file on the ProMods website. Select "1.32" as your game version and check "No Special Transport DLC" if you don't own it. Never use an old def file. Do not use an old save file