why am i getting this outlook rules error

"Most likely you ran out of space for rules. There is a limit in Exchange to how much space the rules can take per mail account.

Quote from an answer here:

There is a size limit for the rules, not a an amount limit. The limit is in
Exchange and not in Outlook. Exchange 2003 and previous have a limit of
32KB. Exchange 2007 has a default limit of 64KB but this can be extended to
256KB by your mail admin.

More info and suggestion about what to do here and here."