set protocols bgp system-as 100
set protocols bgp address-family ipv4-unicast redistribute table 239

Renders

address-family ipv4 unicast
  redistribute table 
 exit-address-family

Expected

address-family ipv4 unicast
  redistribute table 239
 exit-address-family

The issue is that the table ID is not properly retrieved from the dict in https://github.com/vyos/vyos-1x/blob/5ddcfdb4c9352e1178f275eeb317b049795fd1a8/data/templates/frr/bgpd.frr.j2#L310-L315
Also FRRouting supports redistributing multiple non-main tables into BGP, this is a backwards compatible change/fix which will ba added also to VyOS 1.4

There also have not been any smoketest for redistribute table which will be added during bugfix, too