[c-nsp] strange crypto map on C891f

[Juergen Marenda]

Hi,

i just migrated a pair of 1812's to C891f with ipsec-tunnels
and found a (even in show run all) not configured crypto-map
called NiStTeSt1 :

That are Cisco C891F-K9 (revision 1.0) devices
running c800-universalk9-mz.SPA.154-3.M6a.bin

ursamajor#sh crypto map
        Interfaces using crypto map NiStTeSt1:

Crypto Map IPv4 "xxxxx" 100 ipsec-isakmp 
[...]

ursamajor#conf t
no crypto map NiStTeSt1
end
ursamajor#sh crypto map
Crypto Map IPv4 "xxxxx" 100 ipsec-isakmp 
[...]

Ok that seems to work, now I have to ask for timeslot 
To reload (after a wr mem) to see weather it re-appears...

Very strange.
Any experience with this ?
An other Back-Door ?

Thank you for some insights,

Juergen.