Unreal tries to import textures as frame animation (date in texture name)

Hello,

I have a problem that’s making me lose my hair. I’m trying to import textures into a UE4 project. The only problem is that UE4 seems to think that I’m trying to import a frame animation, probably because my textures have a date at the end of their name. I’m making that assumption because my imported texture’s name gets truncated (the date is nowhere to be found, as well as the underscore preceding it).

I do NOT want to change the file names only because Unreal decided not to import them.

I’d like to know how I can solve this.
Thanks.