All of the resources I've come across when looking into this point to the VPP being incorrectly set up for particular phones or our management in general. We don't actually utilise VPP and all of the devices have require password for free apps disabled.
The pattern seems to be that if it's to do a fresh install it won't work but if it's an app management change then it will. There have been some exceptions to this however.
I have tried using multiple apple ID's to test this and have received varied results.
Has anybody experienced a similar issue that may be able to help?
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