I have found the brushes. deleted them. And made them again. Why does it keep saying 'duplicate plane'? Or what causes there to be duplicate planes?

Q3Map v1.1 (c) 2002 Id Software Inc. / Infinity Ward
---- q3map ----
----- FS_Startup -----
Current search path:
D:/Program Files/Call of Duty/\main\St_Nazaire.pk3 (12 files)
D:/Program Files/Call of Duty/\main\severnaya_bunker.pk3 (45 files)
D:/Program Files/Call of Duty/\main\pakb.pk3 (60 files)
D:/Program Files/Call of Duty/\main\paka.pk3 (41 files)
D:/Program Files/Call of Duty/\main\pak9.pk3 (149 files)
D:/Program Files/Call of Duty/\main\pak8.pk3 (235 files)
D:/Program Files/Call of Duty/\main\pak6.pk3 (3 files)
D:/Program Files/Call of Duty/\main\pak5.pk3 (4858 files)
D:/Program Files/Call of Duty/\main\pak4.pk3 (1668 files)
D:/Program Files/Call of Duty/\main\pak3.pk3 (1992 files)
D:/Program Files/Call of Duty/\main\pak2.pk3 (694 files)
D:/Program Files/Call of Duty/\main\pak1.pk3 (2642 files)
D:/Program Files/Call of Duty/\main\pak0.pk3 (12816 files)
D:/Program Files/Call of Duty/\main\Moh_Bridge_beta.pk3 (4 files)
D:/Program Files/Call of Duty/\main\Mogadishu.pk3 (20 files)
D:/Program Files/Call of Duty/\main\Les_Gorges_du_Wet.pk3 (15 files)
D:/Program Files/Call of Duty/\main\dufresne.pk3 (13 files)
D:/Program Files/Call of Duty//main
D:/Program Files/Call of Duty/\main\localized_english_pak5.pk3 (46 files)
D:/Program Files/Call of Duty/\main\localized_english_pak3.pk3 (7 files)
D:/Program Files/Call of Duty/\main\localized_english_pak2.pk3 (9 files)
D:/Program Files/Call of Duty/\main\localized_english_pak1.pk3 (3736 files)
D:/Program Files/Call of Duty/\main\localized_english_pak0.pk3 (1204 files)

File Handles:
----------------------
30269 files in pk3 files
Loading map file D:\Program Files\Call of Duty\Main\maps\mp_ravenoville.map
WARNING: Couldn't find image for shader textures/sky/mp_carentan
Entity 0, Brush 618: duplicate plane
Entity 0, Brush 619: duplicate plane
Entity 0, Brush 769: duplicate plane
Entity 0, Brush 769: duplicate plane
Entity 0, Brush 769: duplicate plane
Entity 0, Brush 769: duplicate plane
Entity 0, Brush 769: duplicate plane
Entity 0, Brush 769: duplicate plane
Entity 0, Brush 769: duplicate plane
Entity 0, Brush 770: duplicate plane
Entity 0, Brush 777: duplicate plane
Entity 0, Brush 783: duplicate plane
Entity 0, Brush 783: duplicate plane
Entity 0, Brush 783: duplicate plane
Entity 0, Brush 783: duplicate plane
Entity 0, Brush 783: duplicate plane
Entity 0, Brush 783: duplicate plane
Entity 0, Brush 783: duplicate plane
Entity 0, Brush 784: duplicate plane
Entity 0, Brush 784: duplicate plane
Entity 0, Brush 784: duplicate plane
Entity 0, Brush 784: duplicate plane
Entity 0, Brush 784: duplicate plane
Entity 0, Brush 784: duplicate plane
Entity 0, Brush 784: duplicate plane
Entity 0, Brush 786: duplicate plane
Entity 0, Brush 786: duplicate plane
Entity 0, Brush 786: duplicate plane
Entity 0, Brush 786: duplicate plane
Entity 0, Brush 786: duplicate plane
Entity 0, Brush 786: duplicate plane
Entity 0, Brush 786: duplicate plane
Entity 0, Brush 787: duplicate plane
Entity 0, Brush 787: duplicate plane
Entity 0, Brush 787: duplicate plane
Entity 0, Brush 787: duplicate plane
Entity 0, Brush 787: duplicate plane
Entity 0, Brush 787: duplicate plane
Entity 0, Brush 787: duplicate plane
Entity 0, Brush 788: duplicate plane
Entity 0, Brush 788: duplicate plane
Entity 0, Brush 788: duplicate plane
Entity 0, Brush 788: duplicate plane
Entity 0, Brush 788: duplicate plane
Entity 0, Brush 788: duplicate plane
Entity 0, Brush 788: duplicate plane
writing D:\Program Files\Call of Duty\Main\maps\mp_ravenoville.prt
   29 unique shaders
   28 actual shaders
finding triangle windings...
merging into concave windings...
added 153 points for thin polygons (1.7% more points)
fixing t-junctions...
finding index mapping and snapping vertices...
triangulating all windings...
0 self-tjunctions fixed
1 degenerate tris removed
simplifying triangles...
182 tris simplified away (2.8%)
emitting triangles...
43 vertices couldn't be merged because the textures point different ways
Writing D:\Program Files\Call of Duty\Main\maps\mp_ravenoville.bsp
    3 seconds elapsed

duplicate planes can be caused many ways

some of the more common ones:

1) not creating your brushes out of caulk and then texturing only the visible surfaces

2) using ctrl-z

3) having more than one brush in the exact same space

and the list goes on

for instance I learned the hard way about rotating brushes and getting duplicate plane errors...