Hello ,
More details :
On SRX100, SRX110, SRX210, and SRX220 devices with 2-GB RAM (for H2/HE2 models), software upgrade to Junos OS Release 12.3X48-D10 fails if the upgrade is done from a release earlier than Junos OS Release 12.1X44-D40, 12.1X45-D30, or 12.1X46-D25. The following error message is displayed:
WARNING: Package 12.3X48-Dxx is not compatible with this hardware
As a workaround, first upgrade Junos OS Release to 12.1X44-D40, 12.1X45-D30, 12.1X46-D25, 12.1X47-D10, or later and then continue to upgrade Junos OS Release to 12.3X48-D10.
Refer https://kb.juniper.net/tsb16646.