Regularly delete old raw data - settings can't be safed

If I check the box # “Regularly delete old raw data from the database” in “Privacy/ Anonymize data”, first it works:

  • Delete logs older than (days) appears and I can define “90 days”
  • SAVE , it seems it works, system is aking for passphrase
  • System answer is green: “Settings updated.”

Everything is fine so far, but after refreshing the page, the settings are cleared… no checkbox, no days, just empty.

BUT all the other settings in “Privacy/ Anonymize data” like “Anonymize Tracking Data” or “Delete old aggregated report data” are working and can be changed any time.