Lump problem

Okay got an minor problem here, I removed some unused textures from my wad using XWE.
I wanted to cut down on filesize, but ran into some problems :(
The map itself runs fine while playing and the console doesn't give me any error messages.
But when I load in my map into doombuilder it cannot find the lumps for these textures which I removed earlier.

Example:
WARNING: Could not find the required lump for the patch N5BRKA01

There are a bunch more of these errors im getting for the textures I removed.
How can I fix this, or should I ignore this and just upload the map to the archives.
Thanks in advance.

I'd assume this is because the patches you removed are still used in some textures. It's not really a problem unless you try to use the textures with missing patches, that's why DB gives a WARNING and not an ERROR.