Still Struggling with Duplicate Entry for key Primary

Saving a new Joomla user to two tables, users and a related table misc_user_addfields
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The pk for users = id (int, auto increment)
The fk for misc_user_addfields = userid (int)
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So what I’m trying to do is make userid = id so that when the form saves the two records are related.
In setup have a save user action and inside its success event have a save data action, see images
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Don’t understand why there’s a duplicate key - the pk and fk are in different tables
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And just to confirm what the two left override columns represent
Left column = fieldname
Middle column = data source
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Seems then the last entry in overrides should work, ie find the id in joomla _user15 and insert into userid.
If this works then userid = id and the two tables are related.
No?
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https://snag.gy/DxZoC1.jpg
https://snag.gy/XWqY5D.jpg

It SHOULD be working I can't see why it wouldn't, send me access details and I'll look all I can think is that you made a mistake when you messed around with the tables

Will do, thanks.
Sent you an email
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users table => https://snag.gy/A3RhBs.jpg
related table => https://snag.gy/etIr8u.jpg

Still haven't solved.
Using save data action works but password not hashed. Is there a way to hash the password before it is saved?

Using PHP or the save user action.

I'll have another look in a bit

Hey Max I can't figure this one out.
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The error happens in preview on their site but I restored a users dump on my local and can't replicate the issue.