OSPF default route and Static default route Distance PROBLEM

I have two routers (R1, R2) in network (they are connected with use of other routers together).
I have OSPF running on R1 AND R2 and default route redistribution on both - i have two routes primary and backup. Normally i’m using only route on R1.

When primary route fails on R1, R1 stop redistributing default and gets default from R2. BUT when the primary route is UP - the default on R2 route stay in routing table.When I disable the default static route on R2 the default route is imported from OSPF R1 and when i enable static route the OSPF route stay to the next fail of primary route.

I quess that this is not a configuration problem:
ON R2 i have:

S 0.0.0.0/0 gw n.n.n.n distane 140
DAo 0.0.0.0/0 gw m.m.m.m distance 110

OSPF cost on default route redistributed from R1 is on R2 130 - but this have nothing to this…