Add migration for #279
Add migration for #279

DMOJ/site,DMOJ/site,monouno/site,Phoenix1369/site,Phoenix1369/site,Minkov/site,DMOJ/site,DMOJ/site,Minkov/site,monouno/site,Phoenix1369/site,Minkov/site,monouno/site,monouno/site,Phoenix1369/site,Minkov/site,monouno/site