Pillagers keep spawning after disabled them in paper.yml

I want to get rid of pillagers, they are in an area where I want to build something.
In paper.yml I set disable-pillager-patrols: true

When I go to the area, where the pillager base was (we removed it but they keep spawning) this setting affects nothing, there are like hundreds of them!
Impact on server performance is massive, we cannot even go to this area because they will follow us to our own bases.

Forgot to mention the version of paper: paper-1.16.4-348

My understanding of that setting is it disables pillager PATROLS from spawning. The groups of pillagers that wander the world. It doesn’t disable pillagers from spawning at their bases.

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But is there a way to stop them spawning in like hundreds?