Can't delete user and communication

I have lots of user for testing and now I want to delete them
There is a strange problem like the picture below

after I clicked in this page I found that this message “Sorry! You cannot delete auto-generated comments”

but I can’t understand why my user will link to this page and I can’t delete this communication either
Hope someone could help me solve the problem

thanks

@1117,

You can unlink the User from the Communication and then delete the user. Click on Relink button on the Communication and remove the DocType and Docname

I followed your step but it still not work
the user still related to the communication

@makarand_b

The problem still can’t be solved
I can not relink after I click “Relink” and the user still link to that communication

I’m having the same issue. Nothing changes after removing DocType, Docname and pressing Relink

official SaaS account
ERPNext: v8.6.1 (master)
Frappe Framework: v8.6.0 (master)

Okay, should’ve searched better. Instead of deleting user, it should be disabled: