same prefix in VRF table from different PEs

PE1 is configured as follows-
ip vrf CUST1
rd 1:1
route-target both 1:1


PE2 is configured as-
ip vrf CUST1
rd 2:2
route-target both 2:2

If prefix is advertised by PE1 & PE2 (with different RDs) to PE3 which is configured to accept (import) both RTs 1:1 and 2:2,

Uptil now the two routes were distinguished by an RD.

But when the routes are redistributed from MP-BGP into VRF, what is left are two identical IPv4 prefixes from different PEs.... and the routing results would be unexpected..

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