What was the first "sequel" sitcom

Hi, new here, I came across a 'Girl Meets World' clip on YouTube shorts when scrolling through one day, and it got me thinking, and it got me thinking, since 'Girl Meets World' is the sequel series to 'Boy Meets World', what was the first sitcom to have a sequel series? Good or bad. When I tried to look it up it basically kept trying to tell me what the first sitcom ever was, but that's not what I wanted to know so I thought I'd ask here