shared ipads - some users being asked for passcode but adamant not set one

[KK20]

We use a dozen shared ipads (MDM is manageengine). There are few issues we have had so far, students and teachers that have these in the class have been using them for months without issue. However there are 5 members of staff who cannot log into the ipads as it asks them for a passcode. Normally in ASM if a user forgets their passcode I go to the user, go to "... more" and "reset shared ipad passcode", but for these 5 staff I dont get that option.

 

The only option I get is "create shared ipad passcode".

 

Normally when a user logged onto a shared ipad I got our ADFS prompt then the user is asked for an apple passcode, these go straight to passcode when they type their apple id (school email) in. Ideas?

 

EDIT: I should have said, if you try and "create shared ipad passcode" for these staff, you get the completed with error "OPERATION_NOT_ALLOWED"

Edited January 18, 2022 by KK20

[KK20]

deleted the users and let the federated update run nightly. After this ASM let me reset the passcode (it not longer said create). Problem solved.