LLD with decreasing OID numbers

[szenrobi]

Hi there !

I have a problem, and cannot solve it.
I have an equipment with full MIB file.
When a take an snmpwalk on the alrIdx the records are the following:

alrIdx.255 = 255
alrIdx.254 = 254
....
alrIdx.1 = 1

The index id decreasing.
Zabbix say the OID is not increasing, and fail the walk/work.

Have you any suggestion how to read the values wiht LLD ?

Thank:
Robert