To create for a user who has this file, here’s a safe and practical guide:

If you have encountered this file name on a torrent site, a forum, a file-sharing platform (like MediaFire or Google Drive), or in a questionable “free DLC” link, you are likely dealing with pirated content, a corrupted file, or—most dangerously—malware disguised as Sims 4 DLC.

So the name is likely fan-invented to lure downloads.

As she reached for a teacup, the mirror flickered. For a split second, she didn't see her own reflection—she saw Hestia, dressed in a gown from the Royalty & Legacy

Conclusion:

Thus: under the current numbering system. Even if EA revived SPs, they would start from SP28, not jump to SP59. The fake tag “-2-” also violates EA’s naming scheme (they use underscores or no extra hyphens).