Graph API Limiting the amount of data I can request - facebook-graph-api

Question

I am trying to extract all the posts from a private FB group of which I am an admin. I am using a Python script to access the data. Whether I use the Graph API Explorer via the web, or my Python script, I am having the exact same problem. I am able to gather the first 6 pages of the feed, each page containing 25 posts. The very first request looks like this:
https://graph.facebook.com/<groupID>/feed?access_token=<accessToken>
That will return, as I stated, the latest 25 posts on the group page.
At the bottom of the JSON that is returned for each request is a section like this:
"paging": {
"previous": "https://graph.facebook.com/v13.0/<pageID>/feed?access_token=<tokenID>&pretty=0&until&__previous=1&since=1649789940&__paging_token=<paging_token>",
"next": "https://graph.facebook.com/v13.0/<pageID>/feed?access_token=<tokenID>&pretty=0&until=1647885515&since&__paging_token=<paging_token>&__previous"
}
I use the value in next to launch the next query. This works until I get to the 6th request. At that point when I request the URL in next it spins for about 15 seconds and then I get the following error:
{
"error": {
"code": 1,
"message": "Please reduce the amount of data you're asking for, then retry your request"
}
}
How exactly do I reduce my data that I'm requesting? I've tried adding the feed.limit() to the request, and it works for the very first request. But that limit is never included in the next URL. Adding it in myself via the script still always returns 25 posts, not what the limit was on the first try. So if I set feed.limit(7) it returns 7 posts on the first request, but then when I use the next link I get 25.
I've set the limit to 100, the first request works, next works the first time, but not the second. If I set the limit to 120 it works with the first query, but now next doesn't. So it seems like it has this built in barrier at 125, it won't give me any more data than that. Any help would be greatly appreciated.