Cisco ACI Change Default Admin User

[Abdul IE#42307]

Is it possible to disable/delete/lock the default admin user account on APIC by another account with the same privileges? I tried doing so and I got this error: 

[kewwa]

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/aci_multi-site/sw/1x/configuration/b_Cisco_ACI_Multi-Site_Configuration_Guide/b_Cisco_ACI_Multi_Zone_Configuration_Guide_chapter_0100.pdf

the default admin is a power user and it seems you cannot do much with it