[Devel] AVP unknown type 25

[Norman Brandinger]

We have recently started logging "unknown type 25" messages (as shown 
below):

openser[4683]: unknown type 25
openser[4683]: val2str(): converting received_ip, 11

The code that is producing the messages hasn't changed:

avp_db_delete("$fU","$avp(s:received_ip)");
avp_write("$si", "$avp(s:received_ip)");
avp_db_store("$fU","$avp(s:received_ip)");

I thought that perhaps there was a new requirement for a modparam 
setting but the "unknown type 25" message was still generated.

modparam("avpops","avp_aliases", "received_ip=i:123")

Has anyone else come across this ? 

Regards,
Norm