Hi there
Members of a Premium Family plan can only switch plans once a year, so you might see this specific error in case you've changed the plan within the past 12 months.
For example, this can happen if you change the Premium Family plan owner to another family member.
In this case, if you just recently left a Premium Family plan and you're trying to re-join, I suggest making sure that the account managing the plan is the same as before.
You can also check when you first/last joined a Premium Family plan by looking for email notifications about it. If you've checked your emails and strongly believe that 12 months have already passed,
--ayun kay pareng google harhar!!