OSPF Outbound Filter - Doing it wrong?

So I feel quite silly that I can't get this working, I haven't done many filters but they were never on a fortigate so I apologize for any ignorance in this post.

So we have a fair bit of individual subnets hanging off of the 10.24.0.0/16 space. I specifically want to filter out every /27 that's hung under 10.24.x.x. So currently I have this as my OSPF and prefix list configuration.

config router prefix-list     edit "Block_External-MGMT"         config rule             edit 1                 set action deny                 set prefix 10.43.0.0 255.255.0.0                 unset ge                 unset le             next         end     next end config router ospf     set router-id 10.10.30.1     config area         edit 6.6.6.6             set type stub             config filter-list                 edit 1                     set list "Block_External-MGMT"                     // using the default outbound since this is the origin of redistributed                 next             end         next     end     config redistribute "static"         set status enable         set routemap "static-to-ospf-filter"         set metric-type 1     end end

The redistribution is a working filter list allowing 2 specific static routes be advertised to a separate area I did not list in this config.

To be specific I am trying to keep only the networks I've added into area 6 stay in area 6 and not be impacted by the redis going on at this specific firewall. The other sites on this area get a bunch of subnets redistributed from another area that's working with completely different firewall's.