BGP - changing cluster-id

The network:

[R3]---[R5]---[R4]---[EXTERNAL AS]

R3 is IBGP peer with R5
R5 is IBGP peer with R4
R5 is the route reflector

Here is the bgp entry for a route learned initially from R4:

R3#show ip bgp 6.0.0.0
BGP routing table entry for 6.0.0.0/24, version 5
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
65000
4.4.4.4 (metric 2) from 5.5.5.5 (5.5.5.5)
Origin IGP, metric 0, localpref 100, valid, internal, best
Originator: 4.4.4.4, Cluster list: 5.5.5.5

Changing the cluster-id:

R5(config)#router bgp 345
R5(config-router)#bgp cluster-id ?
<1-4294967295> Route-Reflector Cluster-id as 32 bit quantity
A.B.C.D Route-Reflector Cluster-id in IP address format
R5(config-router)#bgp cluster-id 5

Here's how the change looks on R3:

R3#show ip bgp 6.0.0.0
BGP routing table entry for 6.0.0.0/24, version 9
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Flag: 0x800
Not advertised to any peer
65000
4.4.4.4 (metric 2) from 5.5.5.5 (5.5.5.5)
Origin IGP, metric 0, localpref 100, valid, internal, best
Originator: 4.4.4.4, Cluster list: 0.0.0.5