Not quite.
I said, keep the bridge and add all the vlans to the bridge.
Then use
/interface bridge ports and
/interface bridge vlan settings as required.
To distribute the vlans to the appropriate ports.
As per this article.
viewtopic.php?t=143620
quick sample.................
/interface bridge port
add bridge=bridge interface=ether5 ingress-filtering=yes frame-types=admit-only-vlan-tagged
etc.......
lets say ether 2-4,6 were attached to pcs on vlan99
add bridge=bridge interface=ether2 pvid=99 ingress-filtering=yes frame-types=admin-only-untagged-and-priority
(repeat for 3,4,6)
/interface bridge vlan
add bridge=bridge tagged=bridge,ether5 vlan-ids=20,30
add bridge=bridge tagged=bridge,ether5 untagged=ether2,ether3,ether4,ether6 vlan-ids=99 (if the rest of the etherports were access ports going to dumb devices.)