On boot you see the message on the appliance LCD 'I1912 SEL Full'
The System Event Log (SEL) is full on the appliance. This is not a SSIM software issue, it is an issue in the BIOS/Firmware of the appliance.
If the Appliance is a 9th generation appliance, press CTRL-E on boot to enter the BMC Setup and clear the SEL in there (Fig. A) below.
If the appliance is an 8th generation appliance, the SEL can be cleared through the DRAC SEL page under LOGS (Fig B.) below.