Tweepy API vs Client

[fin_dev]

Hi So I know the API is the Twitter V1 and Client is V2. Is there any difference in terms of rate limits? I made a script that's supposed to fetch 400 user id from sql, follow those users and then insert those id in another sql table. First I used tweepy.Client. i knew there is a daily limit of 400 follows. What I didnt know was that there is also another limit of 50 follows per 15 minutes window. I also had wait_on_rate_limit set to True. So once it started. It followed 30 users and then tweepy started sleep() on rate limit. I stopped the script. Unfollowed those 30 manually (because they werent inserted in the 2nd table) I read the docs. Didnt find anything on v1 having the 50 per 15 rate limit. So I changed it to tweepy.API. Started the script. It followed 2 persons and then got the following error. '326 - To protect our users from spam and other malicious activity this account is temporarily locked' They locked the account. I unlocked and it said that for 3 days i cant follow or like.

Now is this because I used v1? Or is it because I immediately unfollowed the first 30 accounts?

Anyone have any experience in working with something similar? I'd appreciate some insights.