Found out what made the subnets, unders each 10.0.0.0/8 there is 1 juniper srx router with em0.0 interface and netxms discovers networks 10.0.0.1/8, 10.0.0.4/28, 128.0.0.1/2 and ipv6 address. None of those addresses are configured by me (they dont exist in configuration). Would it be possible to ignore auto creating of such large networks? Or what could be fix for that ?

Got it working now, many thanks.