Adding spf record to digital ocean

So i have my gsuite email which is [email protected] the email server is setup on digital ocean. I use yet another mail merge to send emails in bulk, today i got flagged for my emails potentially being marked as spam because i dont have an spf record. I've added the spf record in digital ocean v=spf1 include:_spf.google.com ~all

However im now abit confused because from what I can understand if you use multiple mail program such as yet another mail merge which i use I need to merge the spf record with yet another mail merge? how am i supposed to merge them? When i check my domain using https://toolbox.googleapps.com/ is flagged for error '"Every name server must reply with exactly the same TXT records. "