I'll add my .02 as well, I've kept crushed grains in airtight containers for nigh on a year with no issues.
I am using crushed PM that is 15 months old - but my last brew only went from 13.8 BRIX to 7.6 BRIX.
They're ruined, send them to me.jk. Obviously you're absolutely fine.
AH, Does that look right?
let Dave try it.