EGTG, A006 - duplicate parking index numbers

[mherweg]

/E/G/T/EGTG.groundnet.xml:2
./E/D/A/EDAC.groundnet.xml:2
./E/D/N/EDNV.groundnet.xml:2
./E/S/S/ESSG.groundnet.xml:2
./K/G/Y/KGYR.groundnet.xml:2
./K/N/U/KNUC.groundnet.xml:2
./K/M/L/KMLB.groundnet.xml:2
./K/F/P/KFPR.groundnet.xml:2

Airports/A/U/0/AU01.groundnet.xml:2
Airports/A/0/0/A006.groundnet.xml:2
Airports/E/G/T/EGTG.groundnet.xml:2
Airports/E/K/S/EKST.groundnet.xml:2
Airports/E/D/A/EDAC.groundnet.xml:2
Airports/E/D/N/EDNV.groundnet.xml:2
Airports/E/S/S/ESSG.groundnet.xml:2
Airports/N/E/7/NE79.groundnet.xml:2
Airports/N/E/4/NE40.groundnet.xml:2
Airports/L/K/B/LKBU.groundnet.xml:2
Airports/L/K/R/LKRK.groundnet.xml:2
Airports/X/B/E/XBEL.groundnet.xml:2
Airports/K/G/Y/KGYR.groundnet.xml:2
Airports/K/N/U/KNUC.groundnet.xml:2
Airports/K/M/L/KMLB.groundnet.xml:2
Airports/K/F/P/KFPR.groundnet.xml:2
Airports/K/F/K/KFKL.groundnet.xml:2
Airports/K/S/L/KSLI.groundnet.xml:2
Airports/W/A/0/WA0H.groundnet.xml:2
Airports/W/X/Z/WXZ3.groundnet.xml:2
Airports/W/T/8/WT81.groundnet.xml:2
Airports/M/R/O/MROC.groundnet.xml:2
Airports/Y/A/C/YACD.groundnet.xml:2
Airports/Y/H/T/YHTS.groundnet.xml:2
Airports/Y/H/O/YHON.groundnet.xml:2
Airports/Y/I/F/YIFL.groundnet.xml:2
Airports/Y/B/C/YBCS.groundnet.xml:2
Airports/Y/S/E/YSEA.groundnet.xml:2
Airports/6/B/6B4.groundnet.xml:2
Airports/S/B/M/SBMO.groundnet.xml:2

I'm investigating..

[mherweg]

EGTG: ok
A006: ok
WXZ3: ok