[rrd-users] every second this happens

[Marc Fromm]

Every second root receives this mail message
Fri Apr 18 15:54  57/3283  
"Cron <root at www> /usr/local/bin/rrdtool/update.pl"

The email lists several entries like this:
+ rrdtool update webhits.rrd 1208558340:3
ERROR: illegal attempt to update using time 1208558340 when last update
time is 1208559120 (minimum one second step)

+ rrdtool update localstats.rrd N:1:0.08:0.06:0.10:0.0784818878294944
481x179
481x168
481x168
481x168
481x168
481x168


In cron.d this entry exists
vi /etc/cron.d/rrdtool.sh
#!/bin/sh
#

* * * * * root /usr/local/bin/rrdtool/update.pl

Can someone explain to me what is happening and how to fix this illegal
attempt message?

Thanks

Marc