The Filegroup PRIMARY for the database CRM running out of space
This isn't an error from your SQL Server. At least I couldn't find it in sys.messages. (If you didn't post the exact error message or if you have an additional error number, please adjust your post.)

You have some monitoring software which assumes that you want to get notified when a database is close to full (for some filegroup). You can choose to ignore that notification and rely on the autogrow functionality in SQL Server, or you can expend the size of the file manually. Up to you. 

Manually growing can be better since you control when you do this. Not that growing a file block general operations, but if you wait for an autogrow to kick in, then you have one or more users that suffers during that autogrow (those who need more space at that point in time).

Also, make sure that you have reasonable autogrow settings and consider whether you want to turn on Instant File Initialization.