Assigning more than one account to a technician - "User does not have sufficient privilege"

Assigning more than one account to a technician - "User does not have sufficient privilege"

I created a technician to be able to logon the local authentication. I did not import him from any domain, I created him on the application. After editing the technician by assigning him to more than one account. I get the “ User does not have sufficient privilege error”. But if I assign only one account to the technician, it saves successfully

Please assist. Attached is the error message


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