Change family manager to Ps 4?

Set up the Ps4 for my son some time ago!

In the meantime it would be appropriate to set seasons!

However, his scores run under the user of the family manager

is entered! Can I switch the family manager between two users

that my son keeps his scores and I can act as a family manager?

In the settings under Parental Control / Family Management you can normally choose who the parent is and check it and set the times for the children in the other Ps4 account.

I'm in it as a parent / legal guardian, but I can't change the Family Manager setting - even if I have logged in with the Family Manager account…