Random dark areas on custom map prevents placement of units but not doodads

[Kittekalling]

Hello people, i am new to map making and I am sorry if there is an obvious solution or if it has already been solved in here (probably has) and I am just too blind to find it.
As you can see from the picture below, i have these 2 random dark spots on my map, I've had them since finishing the terrain, and its not like they break the map at all, that area isn't that crucial to the gameplay. However, now as I am polishing i panned over them again, and its not that i have anything against them, except they prevent me from placing units there.
I can still place doodads though.
I have tried to play with the terrain to no avail.
If someone out there knows how to fix this, letting me know would be much appreciated.

Thanks in advance

 

[Chaosium]

That looks like boundaries, you should be able to get rid of them with this button

Once it's selected just mouse over and click the black area as if you painted the terrain and it'll remove it

 

[Kittekalling]

That looks like boundaries, you should be able to get rid of them with this button

View attachment 469335

Once it's selected just mouse over and click the black area as if you painted the terrain and it'll remove it

Yep, that was it.
Thanks man